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Within the context of paving the way for a sustainable bioeconomy, there is a strong emphasis on utilizing bio-based raw materials as substitutes for fossil fuels in the production of polymers. When designing the synthesis of novel polymeric materials from bio-based building blocks, a promising green approach consists in utilizing enzymes as biocatalysts. This aspect is particularly important when aiming to obtain products from the class of polyesters and polyesteramides with biocompatible and biodegradable properties, as enzymes facilitate the synthesis of polymers that align closely with biological systems. Lipases have been proven to be very effective in the synthesis of polymers, particularly in the ring-opening polymerization of ε- caprolactone. Considering the possibility of performing the copolymerization of ε- caprolactone for obtaining random and block structures, this is the first comparative study of the enzymatic polymer synthesis utilizing an innovative approach of combining ring-opening polymerization with polycondensation. Terpolymers derived from ε- caprolactone and dimethyl itaconate or dimethyl adipate with either 1,8-octanediol or 1,8-octanediamine were obtained at 85 °C in a solventless systems, yielding products with a copolymer content of >85 % and weight-average molecular weight (M w) up to 40,000 Da. The thermal properties and biodegradation behavior of the synthetized terpolymers were assessed. • Enzymatic synthesis of terpolymers from ε-CL, DMI/DMA, and ODO/ODA was achieved. • Equimolar ratio of the monomers led to >92 % conversion and low dispersity. • Among the tested initiators water (10 %) was the most effective initiator in ε-CL ROP. • Combining different monomers four new polyesters/polyesteramides were obtained. • Biodegradability of all samples tested exceeded 40 % after 30-day evaluation. [ABSTRACT FROM AUTHOR]

Polyesteramide polyol was synthesized by employing aminolysis with a base catalyst with custard apple seed oil as source material. It was afterward esterified with phthalic anhydride to form polyesteramide polyol. Polyurethane coatings are produced by combining polyesteramide polyols, which are synthesized, with hexamethylene diisocyanate trimer (HDI). The co-precipitation technique was used to synthesize a nickel-aluminum layered double hydroxide (Ni-Al LDH). Subsequently, the synthesized Ni-Al LDH was further modified by incorporating the corrosion inhibitor 2-mercaptobenzothiazole (MBT) into its interlayer space by the in-situ method. The synthesized Ni-Al LDH and Ni-Al-MBT LDH are then incorporated into the polyesteramide polyol to enhance the anti-corrosive properties of the polyurethane coatings. The synthesized diethanolamide, polyesteramide polyol, and LDH have been characterized using FTIR whereas SEM and XRD are specific to LDH analysis. EIS, DSC, TGA, salt spray, contact angle, and mechanical testing such as thickness, adhesion flexibility, scratch hardness, impact resistance, and pencil hardness are focused on coating evaluation. The incorporation of LDH led to a substantial enhancement in the coating's corrosion resistance, as evidenced by a decrease in corrosion. Incorporating LDH and MBT-LDH improved the scratch resistance of the coating by 1.5 kg compared to plain PU coating, whereas hardness properties also improved slightly. In anticorrosive analysis, it is observed that LDH and MBT-LDH show better anticorrosive performance as compared to plain PU coating. [Display omitted] • Utilization of waste seed-based oil for the development of coating and its performance improvement with layered materials. • Synthesis and characterization of polyesteramide polyol from custard apple seed oil. • Incorporation of nickel-aluminum layered double hydroxide (Ni-Al LDH) and LDH-MBT into the polyesteramide polyol. • Characterization- FTIR, SEM, XRD, EIS, DSC, TGA, salt spray, and mechanical testing to evaluate the LDH-modified coatings. • Significant improvement in corrosion resistance observed in the LDH-modified polyurethane coatings. [ABSTRACT FROM AUTHOR]

• The properties of carboxylated chitosan/trimesoyl chloride membrane were tailored. • Mid-drying facilitated the permeation flux and salt rejection of the membrane. • The membrane performance was susceptible to the phase transfer catalyst. Thin-film composite polyesteramide nanofiltration membrane prepared from carboxylated chitosan and trimesoyl chloride was carefully tailored during its fabrication process of interfacial polymerization. The effects of post-curing, mid-drying and the addition of phase transfer catalysts on the membrane properties were studied using single-factor experiment. Post-curing was found to be effective in improving the separation performance of the membrane containing high concentrations of carboxylated chitosan, and the optimal post-curing effect was achieved at a temperature of 40 °C and curing time range of 15−20 min. Mid-drying enhanced the permeation flux and salt rejection of the membrane containing low concentrations of carboxylated chitosan, and the optimum temperature range for the mid-drying process was obtained at 30−40 °C. Furthermore, the membrane properties were susceptible to the addition of phase transfer catalysts, and a uniformly distributed phase transfer catalyst is vital to its influence on membrane properties. The addition of 0.025 wt% benzyltriethylammonium chloride to the aqueous solution exhibited the best effect towards the improvement of the separation performance of the produced membrane. [ABSTRACT FROM AUTHOR]

• A new concept of SIP was proposed for the preparation of PEA NF membranes. • The reactivity of hydramine could be activated by a trace amount of diamine. • The "hydramine-diamine" coupling unit acts as the reactive monomer. • The PEA membranes exhibited an improved salt rejection and considerable PWP. Polyester-amide (PEA) thin film composite (TFC) NF membranes have rapidly evolved towards a competitive performance, benefiting from their remarkable antifouling capability and superior chlorine resistance. In this report, a new concept of synergistic interfacial polymerization is explored, which promptly triggers the reaction between hydramines and trimesoyl chloride (TMC) in the presence of a trace amount of diamines. This rapid-start mode enables the formation of defect-free PEA films without the requirement of catalysis. A comprehensive characterization of physicochemical properties using high-resolution mass spectrometer (HRMS) reveals that the recombination and formation of a "hydramine-diamine" coupling unit plays a decisive role in activating the synergistic interfacial polymerization reaction with TMC molecules. Taking the pair of serinol and piperazine (PIP) as an example, the PEA-NF membrane fabricated with 0.1 w/v% serinol mixed with 0.04 w/v% PIP as water-soluble monomer and 0.1 w/v% TMC as oil phase monomer was found to have a pure water permeability (PWP) of 18.5 L·m−2·h−1·bar−1 and a MgSO 4 rejection of 95.5 %, which surpasses almost all the reported PEA NF membranes. Findings of the current research provide more possibilities for the low-cost and rapid synthesis of high-performance PEA membranes aiming for water purification. [ABSTRACT FROM AUTHOR]

[Display omitted] • • Degradable alternating polyamide hard segments and soft crystallizable segments were combined. • • These polyester amide elastomers (PEAEs) show excellent mechanical properties. • • PEAEs show fast degradation under mild conditions. • • PEAEs demonstrated outstanding processing capabilities. Degradable polymers typically require prolonged exposure to harsh conditions for degradation, but this extended duration and severe treatment often result in incomplete breakdown, leading to the formation of harmful microplastics that pose significant environmental pollution risks. In this work, degradable alternating polyamide hard segments and soft crystallizable segments were combined by amide groups to design thermoplastic bio-based polyesteramide elastomers (PEAEs) with customizable properties and rapid degradability. The hard segment of the polymer features an alternating arrangement of amide and ester bonds. This arrangement facilitates the formation of small molecule monomers when the ester bond is broken, preventing microplastic contamination that may arise from incomplete degradation of the hard segment. Additionally, the inclusion of side groups in the soft segment disrupts the crystallization, enhancing its susceptibility to solvent penetration and thereby accelerating the degradation rate. After step-cyclic tensile tests, additional physical cross-linking points were formed in PEAEs to enhance their mechanical strength and elasticity. Furthermore, PEAEs demonstrated outstanding processing capabilities, including compounding, extrusion, pelletization, and spinning. This innovative approach introduces fresh design concepts for the industrial application of bio-based degradable polymers, playing a pivotal role in advancing resource conservation and environmental protection. [ABSTRACT FROM AUTHOR]

Polyester-based membranes are entering into the limelight of prospective membrane technologies as a feasible alternative to conventional polyamide-based membranes for nanofiltration (NF). Various monomers, including β-cyclodextrin (β-CD) and triethanolamine (TEOA), among other hydroxyl terminated compounds, can be substituted for the monomer in aqueous solution during interfacial polymerization (IP) or even incorporated into what would normally be ultrafiltration (UF) membranes. When a polyester selective layer is fabricated, it presents distinct physicochemical properties and a loosening of the active layer compared to a conventional polyamide-based active layer that usually allows for greater water flux while still maintaining reasonable levels of salt/dye rejection. This review presents an overview of the mechanism that governs the formation of polyester-based membranes, discusses potential benefits and downfalls of such membranes for nanofiltration, and evaluates the practicability of various applications, including salt/dye separation, dye wastewater treatment, and more. [Display omitted] • Polyester-based membranes are entering into the limelight of prospective membrane technologies. • Cyclodextrin is a monomer that has pristine properties to enhance membrane performance. • Polyesteramide membranes incorporate both ester and amide groups in the active layer. • One of the advantages of polyester-based membranes is in membrane chlorine resistance. [ABSTRACT FROM AUTHOR]

Polyethylene terephthalate (PET) recycling has been carried out by various methods, e.g., mechanical recycling, chemical recycling, and energy recovery method. In this study, chemical recycling of PET was carried out by aminolysis using ethanolamine and converted into bis(2-hydroxyethyl) terephthalamide (BHETA). We have studied the effective polymeric catalysis of the aminolytic depolymerization of waste polyethylene terephthalate (PET) using sulfated polyborate producing a broad range of crystalline terephthalamides. The reaction was performed by varying the PET: ethanolamine ratio, reaction time and catalyst. Recycled PET bottles, film, and fibres were used for conversion. A yield of 95 % was obtained for PET: ethanolamine ratio of 1:4 (w/w), with 4 h reaction time, at 160 o C with sulfated polyborate as a catalyst. BHETA was characterized with FTIR, 1H,13C NMR, and DSC analysis. BHETA further gets reacted with dimer acid along with Ethylenediamine (EDA) at different molar ratios which produces polyesteramide (PEA) based hot melt adhesive (HMA). Thermal, mechanical, and rheological tests are performed and compared with traditional HMA. The effect on the properties of the hot melt adhesive, such as mechanical properties: tensile strength, shore D hardness, elongation at break; thermal properties: glass transition temperature (Tg), melting temperature (Tm), the heat of crystallization (Hc), crystallization temperature (Tc); adhesion properties: lap shear strength (LSS) and T-peel strength (TPS); rheological properties and degree of crystallinity were investigated. It was observed that the mechanical and thermal properties are increased by optimizing the concentration of BHETA. These HMA materials may have the capacity of being eco-friendly and have high adhesion properties. [ABSTRACT FROM AUTHOR]

Renewable source based anticorrosive and antimicrobial polyesteramide polyols were synthesized by reacting algae oil with diethanolamine and thio diacids viz. mercaptosuccinic (MSA) and thiodipropionic (TPA) acids. The confirmation of structures and molecular weights of prepared polyols were done by 1H NMR and FTIR spectroscopic techniques, and size exclusion chromatography (SEC), respectively. The polyols were used to prepare PU which showed excellent adhesion (100%) as compared to algae oil fatty amide (AOFA) (88%) high gloss (118 and 115). This PU passed flexibility test and showed good chemical resistance in comparison to the AOFA based PU coatings. The prepared PU coatings were checked for the anticorrosive property by dipping and electrochemical method performed against 3.5 wt% NaCl and 5 wt% HCl corrosive media. The PEA- PU possessed lower corrosion rate (mm/year) and I corr values as well as high polarization resistance (R p) and inhibition efficiency, than uncoated (blank) and AOFA based PU (PU-AOFA). Both MSA and TPA based PU coatings showed good antimicrobial potential and reduction in bacterial attachment, against Gram - negative (E. coli) and Gram - positive (S. aureus) bacteria in comparison to the control and AOFA PU coatings as observed through SEM and the thermal stability of modified PUs was also improved. Unlabelled Image • Algae oil, mercaptosuccinic and thiodipropionic acids based polyols was used as surface coatings. • Bio-based polyurethane coatings are prepared using polyols. • Polyurethane coatings showed superior corrosion resistance property in salt and acid corrosive media for mild steel. • The polyurethane coatings showed good anti-microbial, chemical resistance, and adhesion properties. • Algae oil and thio acids are ability to substitute conventional petroleum based raw materials in surface coating industry. [ABSTRACT FROM AUTHOR]

Reverse osmosis is an effective seawater desalination way extending the available sources of fresh water, but challenged by the gypsum scaling. Herein, D (+)-glucosamine (DGA) was rationally selected and utilized to prepare a novel polyesteramide (PEA) NF membrane that can reject SO 4 2− but release Ca2+. Then it was employed in the pretreatment of seawater reverse osmosis to spatially isolate SO 4 2− and Ca2+, thus removing the "foundation" for forming gypsum. Compared to the referenced NF270, the optimized sample denoted as DGA-PEA-NF has a looser structure with stronger negative charge, as well as a higher resistance to both organic fouling and chlorine attack. During the pretreatment of seawater, both the water permeability and SO42−/Ca2+ selectivity of the DGA-PEA-NF membrane were much higher than those of NF270; the seawater permeance and SO 4 2−/Ca2+ selectivity of DGA-PEA-NF were 10.25 L m−2·h−1·bar−1 and 7.62, respectively, while those of NF270 were only 5.11 L m−2·h−1·bar−1 and 2.08. Consequently, the DGA-PEA-NF membrane effectively reduced the gypsum scaling both in NF and RO stages rather than just transferring the fouling problem forwards to NF stage. The implementation of this research is expected to provide guidance for a targeted fabrication of NF membranes, as well as support for the sustainable development of seawater desalination. [Display omitted] • A novel polyesteramide NF membrane was prepared with D (+)-glucosamine as monomer. • The optimized DGA-PEA-NF membrane showed a high SO 4 2−/Ca2+ selectivity. • DGA-PEA-NF membrane showed high resistance to organic fouling and chlorine attack. • Novel "NF + RO" seawater desalination process was formed with DGA-PEA-NF membrane. • The gypsum scaling/fouling in both NF and RO could be significantly alleviated. [ABSTRACT FROM AUTHOR]

The synthesis of polyesters and polyamides by enzyme-catalyzed processes in vitro was developed in the last decades as a green alternative to obtain biodegradable synthetic polymers with various applications, such as nanoparticle-sized carriers for drug delivery. Polyesteramides were much less studied in this respect, although having the presumable advantage of increased mechanical and thermic resistance brought by the amide moieties. In this work, polyesteramides were synthesized for the first time employing as raw materials ε-caprolactam and a hydroxy acid. L-malic, 3-hydroxybutyric, 12-hydroxystearic and 16-hydroxyhexadecanoic acid, respectively, were investigated as co-monomers in solventless or organic medium, using the immobilized lipase Novozyme 435 as catalyst. The short chain hydroxy acids holding secondary hydroxyl groups yielded oligomers with average degree of polymerization no higher than 4, while in the case of the long-chain 12-hydroxystearic acid this value increased to 7. The best results were achieved by using 16-hydroxyhexadecanoic acid in 2:1 M excess at 80 °C, yielding a product with 75% copolymer content and average molecular weight higher than 3000 Da. The emulsion-solvent evaporation method allowed the efficient production of nanoparticles based on this copolymer, with sizes around 230 nm, used for the encapsulation of a model bioactive compound, the anticancer drug sorafenib. Production yields of >70% and encapsulation efficiencies of around 60% are very promising for further development of this approach. [Display omitted] • Four novel bio-based polyester amides were enzymatically synthesized. • The properties of the enzymatically synthesized PEA's can be fine-tuned. • Nanosized drug carrier formulations were obtained using the 16HHDA based PEAs. [ABSTRACT FROM AUTHOR]

In order to integrate the advantages of polyamide thin film composite (TFC) nanofiltration (NF) membranes and that of polyester TFC NF membranes, a novel polyesteramide (PEA) TFC NF membrane was prepared by interfacial polymerization between serinol and trimesoyl chloride (TMC) and catalyzed by 4-dimethylaminopyridine (DMAP) on a flat-sheet polyethersulfone (PES) substrate membrane. The membrane performance was maximized by optimizing different preparation parameters. The reaction process was divided into four basic patterns. X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy confirmed the membrane had a partially cross-linked active layer that contained ester bonds, amide bonds and residual hydroxyl groups. Morphology analysis showed the surface of the PEA-TFC-NF membrane was grainy, which was different from the typical polyamide membranes. The contact angle and zeta potential measurements confirmed the PEA-TFC-NF membrane was highly hydrophilic and negatively charged across the entire pH range tested. The optimized PEA-TFC-NF membrane had a MWCO of 474 Da and water permeability of 6.0 L m −2 h −1 bar −1 at 0.5 MPa and 25 °C. The membrane salt rejections followed the order of Na 2 SO 4 > MgSO 4 > NaCl > MgCl 2 , which were 96.27%, 83.92%, 58.68% and 28.76%, respectively. Moreover, the PEA-TFC-NF membrane displayed good antifouling ability. [ABSTRACT FROM AUTHOR]

Polyesteramides (PEAs) are considered intriguing materials due to the combination of the favorable degradable capacity of aliphatic polyesters given by the hydrolizable ester groups and the desirable thermal and mechanical behavior of polyamides given by the amide groups. Between polyamides and polyester families, poly(ε-caprolactam) and poly( l -lactide) stand out due to their commercial value and outstanding properties. Nevertheless, to date these two monomers have not been co-polymerized due to their different reactivities. In this work, we report for the first time, up to our knowledge, the synthesis of poly(ε-caprolactam- co - l -lactide) copolymers with different compositions. Two different catalysts: (a) Brønsted acid ionic liquid 1-(4-sulfobutyl)-3-methylimidazolium hydrogen sulfate (BAIL) and (b) Brønsted base P 4 - t -Bu have been explored. In the presence of Brønsted acid the l -lactide reactivity is higher than the ε-caprolactam while in the presence of Brønsted base the opposite behavior is observed. Using Kelen-Tudos method the monomer reactivity ratios are calculated and obtained as r CLa = 0.39 and r LA = 1.6 and r CLa = 2.2 and r LA = 0.1 using BAIL and P 4 - t -Bu, respectively. These differences in the monomer reactivity ratios give us the possibility to create copolymers with different chain microstructure depending on the employed catalyst between 2 and 9 kDa. Thus, using P 4 - t -Bu random copolymers can be obtained at high l -lactide concentration and blocky character copolymers at high ε-caprolactam concentration. Meanwhile, using BAIL catalyst random like copolymers are obtained at high ε-caprolactam contents and blocky character at high l -lactide contents. [ABSTRACT FROM AUTHOR]

We described preparation of composites of graphene oxide with copolymers containing ε-caprolactam and ε-caprolactone structural units. Graphene oxide was prepared using modified Hummers method and characterized by elemental analysis and X-ray photoelectron spectroscopy measurements, interlayer distance was evaluated from X-ray diffraction. Two types of copolymers - polyesteramides - with molar ratio of ε-caprolactam to ε-caprolactone units in polymerization feed 80/20 and 90/10 were prepared by polymerization casting method. Graphene oxide content in both types of polyesteramides was in range from 0.1 to 1 wt.%. Thermogravimetric analysis and differential scanning calorimetry were utilized to study thermal stability and crystallization behaviour of materials. Prepared composites were characterized by tensile modulus and impact strength. Rheological properties of polymer melts and viscometry of diluted polymer solutions revealed the physical character of polymer-filler interactions. [ABSTRACT FROM AUTHOR]

Bio-based thermoset polyurethane (PU) coatings comprised of polyesteramides were prepared from Gossypium arboreum (cotton seed) plant oil as a renewable source. Oil was first converted into fatty amide that was transformed into a series of polyesteramide polyols upon esterification with different dicarboxylic acids and anhydride. In the preparation of polyesteramide polyols, to increase bio-based content five different dicarboxylic acids of renewable nature were used to replace petroleum counterparts. Structures of polyols were confirmed using NMR and FT-IR spectroscopic techniques. Molecular weights of polyols were determined using gel permeation chromatography. Bio-based polyesteramide polyols were used to prepare thermoset PU by treating with aromatic diisocyanate. The thermal behavior of all prepared polyurethane coatings was determined using a thermogravimetric analyzer and differential scanning calorimeter. Coatings prepared using renewable source based polyesteramides were with high suitable curing, mechanical/chemical performances, alkali/acid resistance, and hydrophobicity. Compared to conventional PU coatings, the prepared coatings possess the superior properties such as gloss, adhesion, and pencil hardness. Thus present work demonstrates Gossypium arboreum plant oil and dicarboxylic acids as newer eco-friendly raw materials for PU coatings and compared with standard petro based polyols. [ABSTRACT FROM AUTHOR]

[Display omitted] • Two novel polyesteramide NF membranes were prepared via IP by amino-alcohol monomers. • The THAM-TFC membrane showed high permselectivity (17.7 LMH/bar, 98.0% of Na 2 SO 4). • The relationship between monomer structure and membrane performance was elaborated. • Comparison of two PEA membranes to provide new insights into monomer selection. Although polyesteramide (PEA) nanofiltration membranes exhibit multi-functionalities such as superior antifouling property and chlorine resistance, their low water permeability poses a major impediment for water treatment. In this study, new PEA-based thin film composite (TFC) membranes were constructed by utilizing the amino-alcohol monomers [tris(hydroxymethyl)aminomethane: THAM, and 2-amino-2-methyl-1,3-propanediol: AMPD)] via interfacial polymerization (IP) with trimesoyl chloride (TMC). The THAM monomers with one more hydroxyl group endow the synthesized TFC membranes with higher hydrophilicity and more negative charges contrasted to AMPD-TFC membranes. Interestingly, the AMPD containing non-polar methyl groups were found to attain more compact TFC membranes with a MWCO of 579 Da. This is because more rapid diffusion of AMPD toward the organic phase promotes a more adequate IP reaction, leading to high-crosslinked membranes with smaller pore sizes. The resulting THAM-TFC membrane with a larger pore size exhibit a high water permeability (17.7 LMH bar−1), and superior salt rejection (Na 2 SO 4 : 98.0 %), outperforming the reported polyester NF membranes. Due to the inactive chlorination reaction site of the polyester group, the PEA membranes exhibited stable separation performance after immersion in a harsh chlorine environment up to 96 h. This study comprehensively compared the effects of two structural-similar monomers on membrane structures and performance, providing a guidance of using suitable monomers to fabricate the high-flux NF membranes. [ABSTRACT FROM AUTHOR]

Polyesters derived from the α-hydroxy acids, lactic acid, and glycolic acid, are the most common biodegradable polymers in clinical use. These polymers have been tailored for a range of applications that require a physical material possessing. The physical and mechanical properties of these polymers fit the specific application and also safely biodegrade. These polymers are hydrophobic and do not possess functional side groups. This does not allow hydrophilic or hydrophobic manipulation, conjugation of active agents along the polymer chain, etc. These manipulations have partly been achieved by block copolymerization with, for example, poly(ethylene glycol), to obtain an amphiphilic copolymer. The objective of this review is to survey PLA functional copolymers in which functional α-hydroxy acids derived from amino acids are introduced along the polymer chain, allowing endless manipulation of PLA. Biodegradable functional polyesters are one of the most versatile biomaterials available to biomedical scientists. Amino acids with their variable side chains are ideal candidates for synthesizing such structural as well as stereochemically diverse polymers. They render control over functionalization, conjugation, crosslinking, stimulus responsiveness, and tunable mechanical/thermal properties. Functionalized amino acid derived polyesters are widely used, mainly due to advancement in ring opening polymerization (primarily O -carboxyanhydride mediated). The reaction proceeds under milder conditions and yields high molecular weight polymers. We reviewed on advances in the synthetic methodologies for poly-α-hydroxy esters derived from amino acids with appropriate recent examples. [ABSTRACT FROM AUTHOR]

In accordance to synthesis of sustainable coating, the carboxyl terminated Polyesteramide resin is synthesized from fatty amide of palm oil. To improve the performance of the coating the ZnO-Al 2 O 3 -fly ash composite and functional Multiwall Carbon nanotubes (MWCNTs) were added to the system. The ZnO-Al 2 O 3 -fly ash composite was treated with amine-silane to develop the amino functionality on the periphery. The MWCNT’s were treated to develop the carboxyl functionality. The presence of functionality on the ZnO-Al 2 O 3 -fly ash composite and MWCNT enable the chemical bonding of same to the coating matrix, improving the performance of the coating. ZnO-Al 2 O 3 - fly ash composites were characterised by FTIR, SEM analysis and XRD to confirm the modification. Also singular and synergistic effect chemically bonded nanocomposite to the coating system was studied by varying the composite ratio as 5% (w/w) & 10% (w/w), MWCNTs ratio individually 0.25% (w/w) & 0.5% (w/w) and in combination of both. The anticorrosive properties were improved, impedance value increases from 100 M (ohms) to 10 G (ohms) in EIS measurement. As well as hardness of the coating increases from H to 4H, scratch resistance increases from 2 kg to 3.1 kg. [ABSTRACT FROM AUTHOR]

Polyesteramide multiblock copolymers based on polyamide 6 and diepoxy propylene adipate blocks were synthesized. For this purpose a carboxyl-terminated polyamide 6 ( M n = 2400 g/mol, T m = 205.5 °C) and diepoxy propylene adipate ( M n = 450 g/mol) were separately synthesized and characterized. The incorporation of the oligoester into the polyamide 6 backbone was performed by solid state polymerization (SSP) well below the melting temperature of the polyamide (80–140 °C) so that the physical and thermal properties of the original polyamide 6 block were retained. Formation of the multiblock structure was confirmed by following the increase in molecular weight by SEC, reaction of the end groups by 1 H NMR and by following the maintained melting temperature after the copolymerization. These segmented copolymers have molecular weights up to 10 kg/mol, thermal stability of 325 °C at 5% weight loss and a melting temperature of 205 °C. [ABSTRACT FROM AUTHOR]

[Display omitted] • The PA, PEA and PE membranes were prepared and compared, respectively. • Comparable rejection of organic solutes could be achieved by different membranes. • Different morphological structures of PA, PEA and PE active layers were observed. • The role of positive charges of the active layers on the ion rejection was defined. In this study, three different kinds of nanofiltration membranes with polyamide (PA), polyesteramide (PEA), and polyester (PE) active layers were respectively synthesized by using piperazine, serinol and meso -erythritol as the aqueous monomers for interfacial polymerization. The three types of membranes achieved comparable rejections for the reference organic solute (i.e., xylose) via optimization of preparation conditions, based on which the characteristics of different active layers were comprehensively investigated. Results showed that the PA, PEA and PE membranes exhibited distinct surface morphologies. The special surface structures of PEA membranes and the larger active layer thickness of PE membranes resulted in their lower water permeance compared to PA membranes. Different from PA active layers, the absence of positively charged regions in the PEA and PA active layers was beneficial for the passage of divalent cations and the rejection of NaCl. Moreover, despite the comparable mean pore size, PA membranes exhibited a more uniform membrane pore size resulting in a higher rejection of organic matters in natural water than PEA and PE membranes. This study presented the differences in physicochemical properties and separation performance among the different membrane active layers, which could provide references for the rational selection of nanofiltration membrane types during application. [ABSTRACT FROM AUTHOR]

Highlights: [•] Conducting polymer composite coatings. [•] Superior protection in aggressive environments. [•] Cost effective and eco-friendly. [•] Protection through barrier mechanism. [•] Improved lifetime and serviceability. [Copyright &y& Elsevier]

Highlights: [•] The synthesis of polyesteramides of ε-caprolactone and β-alanine is described. [•] Polyesteramide 1H and 13C NMR spectra are completely assigned. [•] Reaction mechanism is investigated with the help of model reactions. [•] The properties of random and quasi-alternating polyesteramides are compared. [•] The quasi-alternating polyesteramide presents higher modulus and tensile strength. [Copyright &y& Elsevier]

Highlights: [•] Resin blend technique is a simple and useful method for improving paint properties. [•] This paper describes an example of an asphalt cement blended with a polyesteramide resin. [•] Asphalt cements are extensively used in the coatings industry, whereas polyesteramide resins are usually used as industrial coatings for metal surfaces. [•] Asphalt cement is a material commonly used in coating applications due to its good adhesion properties and relatively low cost. [•] PEA resin content produces high-quality anti-corrosive material and thus the blending of the two materials combines the advantageous properties of the PEA and the asphalt cement. [Copyright &y& Elsevier]

Highlights: [•] Preparation of nanofiber layers by electrostatic spinning of polyesteramides. [•] Synthesis of polyesteramides with different molar mass and composition. [•] Control of nanofiber morphology by system parameters. [ABSTRACT FROM AUTHOR]

Highlights: [•] Modified polyesteramide of cottonseed oil. [•] Utilization of resin in coatings. [•] Good coating properties. [•] Able to convert cottonseed oil to coatings. [Copyright &y& Elsevier]

Abstract: In this paper new modified anti-corrosive polyesteramide resins were obtained by means of a condensation polymerization reaction between N,N-bis (2-hydroxyethyl) linseed oil fatty acid amide (HELA) and phthalic anhydride (PA), which was partially replaced with pyromellitimide acetic acid (PAA) as a new dibasic acid source. The structure of the resin was confirmed by FT-IR and 1H NMR spectral studies. The coatings of 50±5μm thickness were applied to the surface of glass panels and mild steel strips by means of a brush. The coating performance of the resins was evaluated using international standard test methods and involved the measurement of phyisco-mechanical properties such as viscosity, drying time, specular gloss, pencil hardness, adhesion, flexibility and impact resistance. Chemical resistance of the resins to water, acid, alkali and solvent was also evaluated to ascertain their suitability as a surface coatings vehicle. The results show that the modification enhances both phyisco-mechanical and chemical properties. The resins were incorporated within primer formulations and evaluated as anti-corrosive single coatings. The results illustrate that the introduction of pyromellitimide acetic acid, containing a pyromellitimide ring, within the resin structure, enhances the corrosion resistance performance of polyesteramide resins. [Copyright &y& Elsevier]

Abstract: Two types of biodegradable poly(ε-caprolactone (CLo))-co-poly(ε-caprolactam (CLa)) copolymers were prepared by catalyzed hydrolytic ring-opening polymerization. For the first type of materials, the respective cyclic comonomers were added simultaneously in the reaction medium leading to the formation of copolymers having a random distribution of co-units within the polyesteramide sequence, as evidenced by 1H and 13C NMR. For the second type of copolymers, the cyclic comonomers were added sequentially in the reaction medium yielding diblock polyesteramides, again evidenced by NMR. The thermal and thermo-mechanical properties of the copolymers were investigated by DSC and DMA and correlated with the copolymer topology and composition. The copolymers were characterized by a storage modulus and α transition temperature intermediate to the modulus and T g of the corresponding homopolymers. The chemical composition and molecular weight of the copolymers proved to have only a limited effect on the thermo-mechanical properties of the materials. The hydrolytic degradation of random copolymers was studied in a phosphate buffer at 60°C and discussed in terms of chemical composition and molecular weight of the copolymers. [ABSTRACT FROM AUTHOR]

Abstract: Efforts have been made for the development of high performance protective coating materials from non drying oil such as Pongamia glabra oil and their commercialization. Zn-containing self cured Pongamia glabra oil based polyesteramide [Zn-APGPEA] resin was synthesized in situ by the reaction of Pongamia glabra fatty amide diol [HEPGA], poly(styrene-co-maleic anhydride) [SMA] and zinc acetate (different ratios) at 100±5°C in the presence of an acid catalyst. The physico-chemical characterizations of the resin were carried out by standard laboratory methods. The structural elucidation of the prepared resin was carried out by FTIR, 1H NMR and 13C NMR spectral techniques. The thermal behavior was studied by TGA technique. Antibacterial activity was measured by agar diffusion method against Escherichia coli and Staphylococcus aureus. The effect of the loading of zinc on properties of Zn-APGPEA film was also investigated. The properties of Zn-APGPEA compared with reported self cured Pongamia glabra polyesteramide [APGPEA]. Physico-mechanical and chemical/corrosion resistance test of Zn-APGPEA coatings showed that the presence of zinc metal in APGPEA considerably enhances the overall film performance and also improves antibacterial activity. Therefore, Zn-APGPEA can be used as an anti-corrosive and antibacterial coatings material which may substitute polymers obtained from petroleum. [ABSTRACT FROM AUTHOR]

Abstract: Polyesteramide resins (PEA) combine the properties of both polyester and polyamide resins. These resins may be modified with various polyhydric alcohols to produce resins with modified properties. Hydroxy ethyl fatty acid amide (HEFA) is the main source of polyhydric alcohol used in polyesteramide resins. New modified polyesteramide resins were prepared and evaluated as anticorrosive varnish for industrial applications by partial replacement of hydroxy ethyl fatty acid amide (HEFA) with polyethylene glycol (PEG400) without affecting the resin constants. Primer formulations based on these modified resins improve the films properties and show good physicochemical and corrosion inhibiting properties. [Copyright &y& Elsevier]

Abstract: For the first time the synthesis of zinc containing linseed oil based polyesteramide resins (Zn-LPEA-1 to Zn-LPERA-5) with different loadings of zinc acetate were carried out by in situ condensation polymerization reaction between linseed oil derived linseed fattyamide diol (HELA), phthalic anhydride and zinc acetate (divalent metal salt, different mole ratios) in the absence of any solvent. By-products such as water and acetic acid were removed by the application of vacuum technique. This approach was employed to overcome the use of volatile organic solvents [VOCs] during processing and application of the resin, that are ecologically harmful. The structure of the resin was confirmed by FT IR, 1H NMR and 13C NMR spectral studies. Physico-chemical properties were studied by standard methods. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) was used to measure the thermal behaviour of the resin. The antibacterial studies of Zn-LPEA resins were carried out by agar diffusion method. Antibacterial activities of Zn-LPEA were compared with reported virgin linseed polyesteramide (LPEA) and zinc incorporated petroleum based polymers. [Copyright &y& Elsevier]

Abstract: Composites were fabricated utilizing melt mixing aliphatic polyesteramide (PEA) with ordinary CaCO3, nano-CaCO3, and nano-SiO2. The effect of filler on the matrix was studied by mechanical properties and hydrolysis rate measuring. The ordinary filler as well as the nano-filler had a negative effect on the stability of the polymer melt, and an improved mechanical property was obtained around a critical concentration of the filler where a percolation phenomenon appeared. When the composites underwent hydrolysis, the inert filler played a role as a mechanical obstacle in the matrix and retarded the hydrolysis; on the other hand, the interfacial area between the filler particle and the matrix resin increased with the filler, which would accelerate the hydrolysis. As a result of these two inverse effects, a minimum and a maximum value appeared in the plot of the degradation rate-filler content graph. For the ordinary filler filled polymer, the filler retarded the hydrolysis; in great contrast, the hydrolysis rate of nano-composites showed a maximum value around the critical concentration of the filler, and was much higher than the neat resin. [Copyright &y& Elsevier]

Abstract: Cd and Zn metal (with completely filled ‘d’ orbital) incorporated linseed oil polyesteramides [Zn-LPEA and Cd-LPEA] were synthesized by in situ condensation polymerization reaction between linseed fattyamide diol (HELA), phthalic anhydride and divalent cadmium/zinc acetate (different mole ratios) obviating the use of any solvent. The structures of these resins were confirmed by FT-IR, 1H NMR and 13C NMR spectral studies. The solubility of the resin was checked in different polar and non-polar solvents. The physico-chemical and physico-mechanical properties were studied by standard methods. Curing and thermal behavior were investigated by DSC and TGA techniques. The corrosion protective performance of coatings on mild steel strips was investigated by standard methods. Agar diffusion method was used to determine the antibacterial activities of these polymers. The studies revealed that the minor incorporation of divalent cadmium and zinc in virgin linseed oil based polyesteramide [LPEA] enhances the physico-mechanical and anticorrosive properties as well as reduces the curing temperature. Besides these properties they also show effective antibacterial behaviour against the Escherichia coli and Staphylococcus aureus. The Zn-LPEA and Cd-LPEA resins are, therefore, inexpensive coatings material, developed from renewable resource, for anti-corrosive and antibacterial applications. [Copyright &y& Elsevier]

Abstract: Annona squamosa- and Pongamia glabra-based polyesteramides (ASPEA and PGPEA) have been reported as corrosion protective coatings. To improve their film properties such as curing, physico-mechanical and anticorrosive properties further, post-vinylation of these resins with styrene and vinyl acetate monomer in varying ratio (4:1, 3:1 and 2:1) was carried out in the presence of free radical initiator (benzoyl peroxide). The incorporation of styrene and vinyl acetate in ASPEA/PGPEA was confirmed by FTIR and 1H NMR spectral techniques. Physico-chemical, physico-mechanical and anticorrosive properties were studied by standard methods. Thermal stability and curing behaviour of vinylated ASPEA/PGPEA was studied by thermo gravimetric analysis (TGA) and differential scanning calorimetry (DSC) techniques. It has been observed that vinylation of these resins improves the curing, physico-mechanical and anticorrosive performance of ASPEA/PGPEA films. Among all 2:1 ASPEA/PGPEA:styrene/vinyl acetate ratio exhibited best results. [Copyright &y& Elsevier]

Abstract: A series of branched polyesteramides (PEAs) were synthesized from adipic acid, hexamethylene diamine, 1,4-butanediol and caprolactam by melt polycondensation using glycerol as branching agent. The obtained copolymers, with glycerol contents of 0–0.9wt% (LPEA–PEAg10) were characterized by FTIR, 1H NMR, DSC and viscometry. The FTIR and 1H NMR spectra demonstrated the formation of ester and amide bonds. DSC data indicated the melting and crystallization temperatures decrease with increasing glycerol content. Water absorption experiments suggested no distinct difference in hydrophilicity between these branched PEAs. Alkaline hydrolysis of PEA films was conducted in pH 11.0 NaOH solution at 37, 50 or 80°C, respectively. The tests showed that PEAs degraded quickly in alkali and the degradation rate increased with the medium temperature. PEA films underwent slow degradation in pH 7.0 phosphate buffer saline (PBS) at 37°C. The degradation was monitored by weight loss, viscometry, DSC, FTIR and 1H NMR analysis. The results showed that branching substantially enhanced the degradation. Structural analyses revealed that ester/amide ratio decreased with incubation time, suggesting the degradation occurs mainly on the ester bonds. During the degradation, the melt temperature and crystallinity of the copolymers increased slightly with the degradation time. [Copyright &y& Elsevier]

Air drying polyesteramide resins (APEAPh) were synthesized by minor incorporations of phthalic anhydride (PA) in poly(styrene-co-maleic anhydride) [SMA] based ambient cured polyesteramide (APEA); the latter prepared by the condensation reaction between N,N-bis(2-hydroxy ethyl) linseed oil fatty amide [HELA] and SMA copolymer in the presence of acid catalyst. The physico-chemical characterization like hydroxyl value, iodine value, saponification value, refractive index and inherent viscosity as well as solubility in different organic solvents were carried out by standard methods. The structure elucidation of the polymeric resin is based on FTIR, 1H NMR and 13C NMR spectroscopic analysis. The thermal stability behaviour was studied by TGA and DSC techniques. The coatings of 70 ± 5μm thickness were prepared on mild steel strips of standard size by brush technique. The scratch hardness, impact resistance, bend test, specular gloss and corrosion resistance test of these coatings show that the presence of phthalic anhydride considerably enhances the physico-mechanical and corrosion resistance performance of APEAPh as compared to those of APEA coatings. [Copyright &y& Elsevier]

In this paper, a new kind of aliphatic biodegradable polyesteramide copolymers P(CL/AU)x/y based on ϵ-caprolactone and 11-aminoundecanoic acid were synthesized by the melt polycondensation method. Hydrolytic degradation behavior of P(CL/AU) copolymers were studied by using FTIR, 1H-NMR and DSC. Chemical compositions, macromolecular weight, thickness of the test sample, and pH of the degradation medium have great effect on degradation rate. The degradation rate decreased with increase in aminoundecanoic acid content, macromolecular weight, and thickness of the test samples, but increased with incubation temperature and pH of the degradation medium. The degradation mechanism was studied according to the mathematical model developed by professor Go¨pferich. [Copyright &y& Elsevier]

Degradable polyesteramide fibres were processed by melt-spinning. Tensile properties of as-spun and hot-drawn fibres were also investigated. After drawing, the overall crystallinity and the melting temperature of the copolymer increased. As a result, the tensile strength of the fibre increased, and the elongation at break decreased. The morphology of the surface and fracture cross section were studied by SEM. During alkaline degradation, the tensile strength and the elongation at break both decreased. [Copyright &y& Elsevier]

The stabilization of polyesteramide (PEA) was studied by TGA, melt index and intrinsic viscosity. Primary antioxidant A1010 (0.6 wt.%) combined with 0.2 wt.% of hydroperoxide decomposer A168 is effective in stabilizing PEA; but the holding life of PEA in the extruder barrel is only 30 min, and the antioxidants are completely consumed when it is extruded four times. Fillers including heavy calcium carbonate (HCC), tricalcium phosphate (TCP) and talc affect both the thermal stability and mechanical properties of the resultant composites, which are discussed in detail. The Turcsanyi model can best describe the composition dependence of tensile strength of the HCC and talc filled PEA, and the Sato-Furukawa can best predict the Young''s modulus of HCC filled PEA, but is poor for the talc-filled material [Copyright &y& Elsevier]

Pongamia glabra is a widely grown tree in the coastal regions and elsewhere in India. The estimated annual production of oil from its seeds is about 50,000 t. The oil has not yet found any significant commercial application. In the present study attempt has been made to synthesize polyesteramide resin from P. glabra seed oil (PGO) and use the former as anticorrosive coating material.Oil from P. glabra was extracted and characterized. It was first converted into N,N-bis(2-hydroxyethyl) P. glabra fatty amide (HEPGA), which was further transformed into polyesteramide (PGPEA, P. glabra polyesteramide) by reacting with the phthalic acid. Characterization of PGPEA resin was carried out by FT-IR, 1H NMR, DSC, TGA and other chemical tests. The coatings of PGPEA resin were obtained on mild steel strips. The coatings can be cured between 185 and 250 °C. The best temperature and time for curing were obtained as 210 °C and 20 min. Physico-mechanical properties of PGPEA coatings were found to be superior to the reported polyesteramide coatings; however, its anticorrosive properties were found comparable with the reported high performance polyesteramides. The nature and amount of unsaturation in the fatty acid chain as well as its conversion into the cross-links all were found to influence the physico-mechanical and anticorrosive properties. The toxicity evaluation and skin irritation tests of HEPGA and PGPEA have shown that these materials are biologically safe for industrial application. [Copyright &y& Elsevier]

A new kind of polyesteramide copolymer based on ϵ-caprolactone and 11-aminoundecanoic acid has been synthesized by melt polycondensation. The copolymers were characterized by FTIR, 1H-NMR, DSC, and WAXD. With the increase in aminoundecanoic acid content, the melting temperature, heat of fusion, and Td,50% increased accordingly. The thermal degradation of the P(CL/AU)x/y copolymers was studied using FTIR, and TG During thermal degradation, the ester bond decomposes at lower temperature, then the amide bond decomposes at higher temperature. [Copyright &y& Elsevier]

The degradation rate of poly(lactic acid) (PLA) is typically modified by copolymerization of the glycolide with lactide. In the present study, the degradation rate of PDLLA was modified by a novel linking of PLA with 2,2′-bis(2-oxazoline). This modification resulted in formation of a more rapidly degrading poly(ester amide) (PEA) for controlled drug release. The hydrolytic degradation of PDLLA and PEA films was studied in PBS (pH 7.4, USP XXIV, 37 °C); the resulting decrease in molecular weight was determined by size exclusion chromatography and the weight loss of films was measured. Drug releases of guaifenesin (mw 198.2), timolol (mw 332.4), sodium salicylate (mw 160.1) and FITC–dextran (mw 4400) from PDLLA and PEA films and microspheres were examined in PBS (pH 7.4, 37 °C). The degradation rate of PEA was substantially greater than that of PDLLA. The release profiles of all small model drugs (mw <332.4) from PDLLA films were biphasic or triphasic, while the release profiles of small model drugs from PEA films varied extensively. Due to the faster weight loss of PEA, FITC–dextran (mw 4400) was released substantially more rapidly from PEA microspheres than from PDLLA microspheres. In conclusion, all model drugs, except guaifenesin, were released faster from PEA preparations than from PDLLA preparations. [Copyright &y& Elsevier]

This paper deals with the two-stage sorption of methanol, 1-propanol and 1-hexanol in a rubbery semicrystalline polyesteramide. This is the first time two-stage sorption is reported for a semicrystalline rubbery polymer. Mass uptake, specimen geometry and surface concentration were measured independently. The two-stage sorption curve describes two overlapping processes; a very rapid diffusion (mode 1) superimposed onto a normal s-shaped sorption curve (mode 2). Mode 1 swelling was uni-dimensional and mode 2 swelling was initially uni-dimensional and later three-dimensional. It was possible to model the sorption curves by assuming time-dependent solute-surface-concentration conditions, similar to those used to describe simple s-shaped sorption. The obtained time dependence, characterised by a single relaxation time, agreed with experimental values of the surface concentration obtained by infrared spectroscopy. The relaxation time increased exponentially with increasing size of the diffusing alcohol molecule. The solubility of the alcohols in the polymer increased with increasing hydroxyl-group density. The diffusivity of alcohol decreased nonlinearly with increasing length of the molecule, size effects being less important for larger solutes. [Copyright &y& Elsevier]

Poly(ester-co-amides), PBSe random copolymers, were prepared by polycondensation of sebacic acid and 1,4-butanediol, introducing 1,4-butanediamine as comonomer. The homopolymer was semi-crystalline with Tm of 65 °C. When the amide content was over 10%, two melting endotherms were observed and their melting enthalpies decreased significantly. WAXD results also showed a decrease of crystallinity with increasing amide content. Poly(ester-co-amides) had intramolecular and intermolecular hydrogen bonding, which was conformed by FT-IR. The degradability of the PBSe series increased with the amide content. Quantitative FT-IR analysis shows that the areas of the amide-amide hydrogen bonded NH band increased but the areas of amide-ester hydrogen bonded NH band decreased during hydrolysis. [Copyright &y& Elsevier]

[Display omitted] • A type of novel cross-linked polyesteramide derivative (PEA-TMC) was prepared. • Diverse N, O-containing functional segments have been introduced into the structure of PEA-TMC. • PEA-TMC can act as efficient "enrichment"-type Pb2+ electrochemical probe. • Efficient and selective adsorption of methylene blue (MB) by PEA-TMC was also studied. The construction of novel polyesteramide (PEA) derivative with diverse structure and multifunction characteristics would provide effective promotion for the further development of PEAs. In this study, a phenolic hydroxyl-modified polyamide (PA) derivative (P2), which was prepared from benzoxazine-isocyanide chemistry (BIC), was selected as the phenolic source to condense with trimesoyl chloride (TMC). A type of novel cross-linked PEA derivative (PEA-TMC), which with diverse N, O-containing functional segments (amide, ester, tertiary amine, hydroxyl and carboxyl groups) in its structure, was successfully constructed. Chemical structure and elementary properties of PEA-TMC were characterized here. As compared to that of bare glassy carbon electrode (GCE), PEA-TMC-modified GCE (GCE/PEA-TMC) illustrated significantly strengthened electrochemical response toward Pb2+. Further investigation revealed that GCE/PEA-TMC can be applied as "enrichment"-type electrochemical probe for Pb2+, with the corresponding detection limit of ∼2.3 × 10−8 mol/L (3σ/k). At the same time, the efficient and selective adsorption of methylene blue (MB) by PEA-TMC was also studied. Experimental results showed that the kinetic and isotherm of MB adsorption by PEA-TMC were in accordance with pseudo-second-order and Langmuir models, respectively, with the maximum adsorption value up to ∼560.80 mg g−1. [ABSTRACT FROM AUTHOR]

• Polyesteramide-based membrane was successfully prepared via interfacial polymerization. • The polyesteramide membrane with high free volume showed high water flux. • Acid and alkali stabilities of polyesteramide membranes were obtained. A novel aromatic polyesteramide-based membrane with high free volume for water desalination was prepared by adding a rigid cardo-contorted biphenol monomer to the aqueous phase solution of m-phenylenediamine (MPD) and then carrying out the interfacial polymerization. Compared with the polyamide (PA) membrane, the polyesteramide membrane with high free volume and ultrathin separating layer exhibited 250% increase in flux and 1.2% loss in salt rejection. Moreover, acid and alkali stabilities of polyesteramide membranes were studied by immersing the polyesteramide membranes into acid, aid/ethyl alcohol (EA), alkali and alkali/EA aqueous solutions. After acid/alkali treatments, the surface contact angles of acid/alkali-treated PA/9,9-bis(4-hydroxyphenyl)fluorine (PA/BHPF) membranes were much smaller than the pristine PA/BHPF membrane. With EA, both the acid/EA-treated and alkali/EA-treated polyesteramide membranes exhibited a significant increase in water flux; moreover, the acid/EA-treated membranes showed a simultaneous increase in water flux and salt rejection within a treatment time of 24 h, due to the increase in hydrophilicity and the partial dissolution of small polymer fragments on membrane surface. [ABSTRACT FROM AUTHOR]

• Eco-friendly, solventless, In-situ preparation of ceria doped Polypyrrole oleo-Polyesteramide nanocomposite coatings. • Hydrophobic, bi-functional hybrid nanofiller dispersed compact nanocomposite coatings. • The coatings exhibit excellent hydrolytic stability, acid resistance, corrosion protection and flame retardancy. • Corrosion protection of coatings is mainly controlled by barrier and redox mechanism. To overcome the shortcomings of petro-based polymer coatings, researchers have intensified research efforts on the development of eco-friendly and sustainable polymer coatings. It may help in reducing the burden on fossil fuel, which is expected to deplete by near future. Thus, here we report the In-situ formulation of solvent-less hydrophobic bi-functional ceria doped Tung Oil Polyesteramide nanocomposite coatings. The physico-chemical, physico-mechanical, structural, corrosion protective and flame-retardancy performance of these hybrid inorganic-organic nanofillers dispersed Tung Oil polyesteramide nanocomposite coatings were investigated using standard methods i.e. Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), x-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vertical burning test (VBT), potentiodynamic polarisation (PDP), electrochemical impedance spectroscopy (EIS) and salt-spray test. The studies revealed that the prepared nanocomposite coatings exhibit excellent adhesion, hydrophobicity, negligible water uptake, superior corrosion protection and flame retardancy behaviour than those of other such reported oleo polymer coating systems. The coatings can be safely used up to 200 °C. [ABSTRACT FROM AUTHOR]