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Polymer-based catalysts have garnered significant interest for their efficiency, reusability, and compatibility with various synthesis processes. In catalytic applications, polymers offer the advantage of structural versatility, enabling functional groups to be tailored for specific catalytic activities. In this study, we developed a novel magnetic copolymer of methyl methacrylate and maleic anhydride (PMMAn), synthesized via in situ chemical polymerization of methyl methacrylate onto maleic anhydride, using benzoyl peroxide as a free-radical initiator. This polymerization process results in a robust copolymer matrix, which was subsequently hydrolyzed in an alkaline aqueous solution to introduce additional functional groups, yielding hydrolyzed PMMAn. These functional groups enhance the copolymer's ability to support the deposition of magnetic nanoparticles and participate in catalytic reactions. Following hydrolysis, we fabricated a unique magnetic composite, Fe3O4@Hydrol-PMMAn, by in situ coprecipitating Fe3O4 nanoparticles onto the hydrolyzed copolymer, creating a stable nanocatalyst. The structural and magnetic properties of Fe3O4@Hydrol-PMMAn were thoroughly analyzed using FTIR, XRD, SEM, EDX, VSM, and TGA. The Fe3O4@Hydrol-PMMAn nanocatalyst demonstrated remarkable catalytic performance in synthesizing tetrahydrobenzo[b]pyran derivatives through a three-component reaction, conducted without solvents to support green chemistry principles. A series of reaction parameters were optimized, including solvent choice, catalyst loading, and recyclability. The catalyst performed efficiently across a broad range of aldehydes, delivering high product yields (81–96%) with rapid reaction times (5–30 min) at a low catalyst loading of 0.015 g. A hot filtration test confirmed the heterogeneous nature of the nanocatalyst, which could be recycled up to four cycles with minimal loss in activity. The high yield, short reaction time, solvent-free conditions, and excellent reusability make Fe3O4@Hydrol-PMMAn a promising catalyst. These findings underscore its potential for converting waste products into valuable compounds, highlighting its utility in organic transformations and sustainable synthesis practices. Collectively, this work demonstrates that Fe3O4@Hydrol-PMMAn is highly effective for organic compound synthesis, advancing the development of versatile, sustainable nanocatalysts. [ABSTRACT FROM AUTHOR]

In this study, a grafted copolymer based on chitosan and Brij S100 (CTS–Brij S100) was prepared to design a nanocarrier system that increases the sensitivity of tetracycline (Tetra) against methicillin‐susceptible Staphylococcus aureus (MSSA). The self‐assembly behavior of CTS–Brij S100 to micelles was confirmed by the benzoylacetone assay. About 4.6 ± 0.175% of Tetra was encapsulated into CTS–Brij S100 with an efficiency of 96.9 ± 0.213%. Dynamic light scattering determined the size of Tetra‐loaded nanoparticles (CTS–Brij S100@Tetra) to be 85.5 ± 1.913 nm with narrow distribution. The high‐positive value of CTS–Brij S100@Tetra (zeta = + 30.9 mV) indicates a stable colloidal system. The release profile of Tetra from CTS–Brij S100 followed the Weibull model with a complex diffusion mechanism. The bactericidal efficacy was tested against MSSA. Interestingly, the blank CTS–Brij S100 nanoparticle could express its inhibition to MSSA when the concentration was 150 μg/mL. Therefore, with the help of CTS–Brij S100, Tetra had superior bactericidal efficiency comparable to free form. In vitro biocompatibility test on fibroblast cells (L929) and bone marrow mesenchymal stem cells (BMSCs) ensures the safety of CTS–Brij S100. It can be concluded that the CTS–Brij S100 system holds potential for applications in facilitating the delivery of the antibiotic Tetra. [ABSTRACT FROM AUTHOR]

Wood modification processes based on citric acid in combination with various copolymers have gained in importance in recent years. These processes also include modification with citric acid (CA) and sorbitol, a sugar alcohol, which is currently in the industrial realisation phase in Germany (SorCA) and Norway (CIOL). The modification of wood with sorbitol and citric acid (SorCA) can significantly improve the dimensional stability and durability of the wood. It is hypothesised that the addition of a copolymer may improve the fixation of the chemicals within as well as the flexibility of the modified wood matrix. In this study, the macroscopic changes, the fixation of the chemicals and the impact bending properties of wood modified with CA and SorCA are compared. Both modifications cause a permanent increase in mass (WPG) and volume (CWB). The fixation of the chemicals was comparable for both modifications; at high chemical concentrations, the SorCA polyester fixed slightly better within the wood matrix. Both modifications led to embrittlement of the wood, measured by a decrease in the impact bending strength (IBS). This embrittlement was clearly concentration-dependent and slightly more pronounced for the modification with CA. [ABSTRACT FROM AUTHOR]

Vinyltrimethoxysilane (VTMS) functionalized ethylenic polymers, in the form of reactor‐made ethylene‐silane copolymers as well as post‐reactor made silane‐grafted ethylene polymers, were evaluated for the purpose of moisture‐induced crosslinking through hydrolysis and condensation reactions. The copolymers were of 1.6 wt% or 4.2 wt% VTMS contents, and the silane‐grafted resins ranged in VTMS contents from 1.1 to 3.7 wt%. The silane‐grafted materials were very reactive under humid conditions at room temperature, resulting in very poor shelf stabilities manifested in sharp drops in their melt indices over time (changes that in the early stages were dominated mostly by resin molecular weight distribution and/or branching, and in the later stages much more by silane content). In sharp contrast, the ethylene‐silane copolymers exhibited outstanding shelf stabilities over time even at relatively high silane content, indicating desirably low reactivities in the absence of moisture‐cure catalyst. When formulated with catalyst, and exposed to humid conditions, the cure characteristics of the silane functionalized ethylene polymers varied significantly, with the fastest and greatest crosslinking observed using the ethylene‐silane copolymer of 4.2 wt% VTMS content and remarkably excellent shelf stability. Analyses of reaction rates revealed very interesting trends, depending on type of catalyst (tin or sulfonic acid) and resin. Highlights: Ethylene‐silane copolymers and silane‐grafted ethylene polymers were studied.Copolymers exhibited vastly superior shelf stabilities than grafted materials.Catalyst type and loading affected moisture‐induced crosslinkability.Increased silane content in copolymer led to faster and greater crosslinking.Best balance of crosslinkability and shelf stability obtained with copolymers. [ABSTRACT FROM AUTHOR]

Liquid‐crystallization‐driven self‐assembly (LCDSA) has recently emerged as an efficient strategy to create uniform one‐dimensional (1‐D), 2‐D and 3‐D nanostructures in a controlled manner. However, the examples of generation of uniform multi‐morphology nanostructures from solution self‐assembly of one single polymer sample are rare. Herein, we report the first example of preparation of multi‐morphology fried‐egg‐like nanostructures consisting of an inner spherical/bowl‐like core of uniform size and platelets protruded from the core by LCDSA of PAMAM‐Azo6 (PAMAM=polyamidoamine, Azo=azobenzene) in methanol. It is disclosed that the different aggregation rates for PAMAM‐Azo6 with varying contents of Azo units spontaneously separated nucleation and growth stages, which led to the formation of inner spherical/bowl‐like cores (“seeds”) firstly, followed by the formation of platelets protruded from the edges of inner core to give “imperfect” fried‐egg‐like nanostructures. Additional annealing of initially formed “imperfect” fried‐egg‐like micelles will promote the rearrangement of Azo units to give thermodynamically‐favored “perfect” fried‐egg‐shaped micelles with a uniform dimension both in the core and whole structure. This work not only provides an efficient strategy to create uniform multi‐morphology fried‐egg‐shaped nanostructures, but also reveals the essential impact of aggregation kinetics of liquid‐crystalline‐coil BCPs in the formation of multi‐morphology nanostructures. [ABSTRACT FROM AUTHOR]

The furan/maleimide Diels–Alder (DA) reaction has been exploited to construct thermally reversible macromolecular structures, such as linear or cross-linked polycondensates, or to cross-link linear polymers, using the free end-type or pending furan and maleimide moieties as the diene and dienophile reagents. Here we report a different approach for the synthesis of homopolymers based on a diol, in which the DA adduct formed by the furan and the maleimide sits within the diol monomer structure. The OH end groups of the diol were used for the synthesis of a polyester and a polyurethane using conventional polycondensation methods and to study their retro DA (rDA) depolymerization through the thermal decomposition of their inner DA adducts. The relevant contribution of this study was however the possibility of synthesizing a copolymer by heating these two polymers together to induce their rDA deconstruction and then lowering the temperature in order to allow the ensuing fragments to recombine statistically by successive DA couplings, thus building the corresponding ester-urethane copolymer. 1H NMR spectroscopy and DSC analysis were employed to confirm the success of this promising approach. [ABSTRACT FROM AUTHOR]

Aim: Personalized medicine has increased the interest in polymer-drug conjugates. In recent years, many polymer-drug conjugates have been developed to increase the specificity and selectivity of drugs for diseases. Noradrenaline (NA) is involved in the pathophysiology of many different neurological, psychiatric, and peripheral conditions. Moreover, NA has been reported to play a role in angiogenesis and tumor development. The MAVA/NA conjugate, a maleic anhydride-vinyl acetate (MAVA) copolymer modification product, and the noradrenaline biomolecule were examined for their antiproliferative and antimicrobial properties. Materials and Methods: MAVA-NA conjugate was synthesized as the modification product between maleic anhydride-vinyl acetate (MAVA) copolymer and noradrenaline (NA) biomolecule. The conjugate was previously characterized in terms of chemical structure by Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (1H-NMR and 13C-NMR) spectroscopic methods, and its topographic properties were characterized by atomic force microscopy (AFM). The minimum inhibitory concentration (MIC) method evaluated the antimicrobial properties against gram-positive and gram-negative bacteria and fungi. Antiproliferative activity was determined by XTT assay on lung (A549), brain (C6), bone (MG-63), and breast (MCF-7) cancer cells and healthy fibroblast (WI-38) cell lines. Results: The MAVA-NA conjugate showed no toxicity within the 3.125-100 µg/mL dosage range in WI-38 cells. Compared to normal fibroblast cells, MAVA-NA exhibited selective toxicity against A549, C6, MG-63, and MCF-7 cancer cells. MAVA-NA showed high antibacterial activity on S. aureus and MRSA bacteria compared to standard antibiotics (S. aureus MIC=50 µg/mL, MRSA MIC=25 µg/mL). Conclusion: These results indicate that the newly synthesized and characterized MAVANA conjugate has antiproliferative and antimicrobial effects and may have a promising role in developing new anticancer drugs. [ABSTRACT FROM AUTHOR]

Recently, environmental applications of copolymers such as CO2 capture and separation have become of significant interest. The development of copolymers with basic functional groups, such as amidoxime (AO) groups, represents a successful approach for enhancing absorption and separation of acidic molecules, such as CO2. In this research, acrylonitrile/N-vinyl imidazole (AN/VIM) copolymers were first synthesized through a free radical copolymerization method using 2,2′-azobisisobutyronitrile (AIBN) as the initiator and dimethylformamide as the solvent. The synthesized copolymers were then functionalized using hydroxylamine hydrochloride (NH2OH · HCl), the result being amidoximated (AO) copolymers. The synthesized copolymers were characterized by nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis and Fourier transform infrared spectroscopy. The analytical results simply confirmed that the copolymers and their amidoximated derivatives had successfully been synthesized. A microstructural study of amidoximated polymers using NMR spectroscopy clearly showed the tautomerization of AO groups. [ABSTRACT FROM AUTHOR]

Two new copolymers (named PTO‐BO and PTO‐HD) with alkyloxime‐substituted thiophene (TO) as acceptor unit and 6‐undecylthiopheno[3,2‐b]thiophene spacer as π‐bridge were synthesized and applied in organic solar cells (OSCs) as electron donors. PTO‐HD with 2‐hexyldecyl side chains on TO moiety possesses more suitable phase separation, more efficient exciton dissociation and charge transportation, and less charge recombination than PTO‐BO with 2‐butyloctyloxime‐substituted thiophene in OSCs with Y6 as the acceptor. As a result, the OSCs based on PTO‐HD:Y6 achieved an optimal power conversion efficiency (PCE) of 13.89% with a Voc of 0.799 V, a Jsc of 22.74 mA cm−2, and a FF of 67.67% without additives, which is higher than that (12.29%) of PTO‐BO:Y6 OSCs. [ABSTRACT FROM AUTHOR]

Highly alkaline hydrogels are gaining increasing attention in building materials research. Specifically, cationic alkaline hydrogels based on diallyldimethylammonium hydroxide (DADMAOH) as the monomer have been effectively used to seal water-bearing cracks or serve as coupling media for electrochemical chloride extraction. However, the residual halogen content and challenges in scaling up monomer production have hindered broader application. Attempts to use a commercially available cation-selective membrane for ion exchange achieved up to 90% chloride-to-hydroxide switch, but the approach proved ineffective due to significant monomer decomposition during the process. By contrast, neutral gels and gel particles can be readily prepared from diallyldimethylammonium chloride (DADMAC) in large quantities and with a wide range of compositions. It is demonstrated here that these neutral gel particles undergo inverse static anion exchange when suspended in NaOH solution, generating DADMAOH particles with residual halide contents of <0.3%, without the need for ion-selective or dialysis membranes. This corresponds to an up to 100-fold reduction in residual chloride content compared to particles produced directly from alkaline monomer solutions, thereby significantly enhancing the efficiency of hydroxide ion release. The swelling behaviour of the particles is primarily influenced by the initial monomer concentration, while conductivity remains largely unaffected, indicating that charge transport occurs mainly along the particle surface. Despite the pronounced increase in swelling with decreasing particle radii, the specific conductivity of 2.8 Ω−1 m−1 is still sufficient for their use as coupling media in concrete applications. In summary, the alkaline particles prepared via inverse static anion exchange meet all necessary requirements for building materials applications, offering a broader range of tuneable properties and greater ease of production compared to gels or particles derived from DADMAOH. [ABSTRACT FROM AUTHOR]

A reversible associated copolymer capable of healing at room temperature was constructed using acrylic acid (AA) and hemin as anionic monomers, and methacryloyloxyethyl trimethylammonium chloride (DMC) as the cationic monomer. Through optimization of the synthesis conditions, characterization by 1HNMR, infrared spectroscopy, ultraviolet-visible spectroscopy, Thermogravimetric analysis, differential scanning calorimetry, and construction of reasonable models for dynamic simulation, the following conclusions were obtained: The introduction of Hemin could convert light energy into heat energy, accelerating the healing of damaged areas; the predicted glass transition temperature value matched well with the experimental value, demonstrating the reliability of the constructed polymer model; the cohesive energy density (CED), dominated by electrostatic interactions, was identified as the key factor in the self-healing mechanism; the study also visually captured the microscopic process of self-healing within the polymer, providing a detailed understanding of the molecular rearrangements that facilitate this process. This work offers valuable insights into the design of reversible associated polymers, contributing to the broader goal of developing functional polymer materials aligned with circular economy principles. [ABSTRACT FROM AUTHOR]

Precise control over sequence structure in copolymers is essential for chemical product engineering. The complexity of sequence structures results in the challenging characterization of monomer sequences. Herein, a chemical composition model (CD model) is developed to record the distribution density of monomers in the chain segment, where the deviation of the chemical composition function between a copolymer and its ideal sequence structure can directly map the sequence structure quality. The application of the CD model in randomly generated virtual copolymers demonstrates that the model has great sensitivity and discrimination to evaluate sequence structures accurately. Furthermore, the CD model is combined with the kinetic Monte Carlo algorithm to explicitly track the evolution of sequence structure quality in the copolymerization process. The CD model provides an insight into the evolution of sequence structure, which is conducive to building the bridge between molecular structure and properties for the development of chemical product engineering. [ABSTRACT FROM AUTHOR]

Сopolymers and the methodology for their synthesis are presented. In order to protect metal products and structures from the effects of corrosion processes, various fillers for polymer coating were selected: silicon production waste (microsilica) and titanium dioxide, as well as their combined mixtures. The obtained copolymers exhibit good adhesion required for composite protective coatings. An experiment was conducted to evaluate the corrosion resistance of metals subjected to aggressive environment, as well as to determine the hardness and thickness of the obtained polymer coatings. Thus, the corrosion score of the polymer coating with titanium dioxide filler is 2 in 5% NaCl and 5% KOH aggressive media and is 3-4 in acidic media with 10% KOH. Polymer coating with microsilica filler has a corrosion score of 2 in salt and acid aggressive media, but in alkaline media such coating performed worse and has a corrosion score of 4. The best corrosion resistance values are for the series 2 combination polymer coating consisting of methyl methacrylate, styrene and vinyl butyl ether, with a corrosion score of 2 in salt and acid media and a corrosion score of 4 in alkaline media. Series 1, methyl methacrylate, maleic anhydride, and vinyl butyl ether combined coating has the worst corrosion resistance: corrosion score of 4, 5, 6 in 10% H2SO4 and in an alkaline media (5 and 10% KOH), respectively. At the same time, the developed polymer coatings exhibit satisfactory adhesion properties even after the exposure to aggressive media.

In this study, electrorheological (ER) properties of biodegradable and conducting polyaniline-graft-chitosan (PAni-g-CS) copolymer particles were investigated. For this purpose, PAni and PAni-g-CS particles were synthesized by using in situ oxidative radicalic polymerization method. At first, PAni and PAni-g-CS/silicone oil (SO) ER suspensions (15% V/V) were subjected to external electric field and they exhibited low ER activity. When the external electric field strengths (E) were increased, both the suspensions showed electrical breakdown. Therefore, virgin PAni and PAni-g-CS were first subjected to dedoping process by treating with 1.0 M NaOH(aq) and non-ionic surfactant Triton X-100 (T-X) surfactant to enhance the expected ER activity and prevent the electrical breakdown. But we observed that the addition of T-X as promoter had no significant effect on the ER activity. On the other hand, electric filed-induced viscosities of both the suspensions were observed to enhance after the dedoping (DD) process and electrical breakdown prohibited. After the DD process, DD PAni-g-CS/SO ER system exhibited the highest electric field-induced viscosity by reaching 400 Pa ⋅ s at E = 4 kV/mm. The highest ER efficiency was also obtained for DD PAni-g-CS/SO system at 15% (V/V) as 79. Additionally, typical shear thinning non-Newtonian viscoelastic behavior was observed under externally applied E. The conduction model of DD PAni-g-CS/SO system was determined to well fit the conduction model by showing a slope of m = 1. 5 calculated from the E vb. yield stress graph. In conclusion, conducting and biodegradable-dedoped PAni-g-CS particles would be a good candidate for potential ER applications as dry-based ER materials having high colloidal stability of 76%. [ABSTRACT FROM AUTHOR]

Organic mixed ionic‐electronic conductors with tunable doping, low threshold voltages, and air stability are crucial for bioelectronic applications. A homopolymer based on an alkoxy thiophene monomer and its copolymer with a thiophene carrying ethylene glycol side chains are synthesized and converted to self‐doped conjugated polyelectrolytes, P3HOTS‐TMA+, and P3HOTS‐TMA+‐co‐P3MEEET. The self‐doping occurs during the conversion to polyelectrolytes. Both polyelectrolytes show high electrical conductivity without any external dopants. UV–Vis–NIR spectroscopy and spectroelectrochemistry confirm excellent air stability of the doped state. In an organic electrochemical transistor (OECT), the P3HOTS‐TMA+ operates in depletion mode, while P3HOTS‐TMA+‐co‐P3MEEET exhibits accumulation mode of operation with low threshold voltage, both showing fast response times. On the other hand, the non‐doped homopolymer, P3MEEET, shows a high negative threshold voltage in accumulation mode. Thus, copolymerization with the self‐dopable monomer changes the mode of operation as well as the threshold voltage substantially. Ultraviolet photoelectron spectroscopy reveals a considerable reduction of the hole injection barrier for the self‐doped system P3HOTS‐TMA+. Mott‐Schottky analysis shows reduction in charge carrier concentration in the copolymer compared to the homopolymer. Thus, the copolymerization strategy with a self‐dopable monomer is an efficient tool for tuning the degree of doping leading to low threshold voltage in OECTs. [ABSTRACT FROM AUTHOR]

A novel polycyclic naphthoxazine resin (NSA‐thiq) is synthesized via N, O‐acetal forming reaction between o‐hydroxyl naphthaldehyde and 1,2,3,4‐tetrahydroisoquinoline. The chemical structure of the monomer is investigated and confirmed by 1H and 13C NMR, Fourier‐transform infrared (FT‐IR) spectroscopy, and high‐resolution mass spectrometry. Besides, the ring‐opening polymerization behavior similar to ordinary benzoxazine resins is observed by differential scanning calorimetry (DSC) and in situ FT‐IR analyses, leading to the formation of the phenolic cross‐linked network. Notably, DSC thermograms indicate that the newly obtained polycyclic naphthoxazine resin exhibits much lower polymerization temperatures compared to many other reported benzoxazine or naphthoxazine resins. Moreover, the corresponding polybenzoxazine (poly(NSA‐thiq)) shows comparable thermal stability in comparison with thermosets derived from monobenzoxazine resins. As a consequence of these unique performances, NSA‐thiq is applied as a property modifier for a commercialized benzoxazine resin (BA‐a). The glass transition temperature of copolymeric thermosets is enhanced without sacrificing too much thermal stability and heat resistance. Here, another series of naphthoxazine thermosetting resin is explored, which can provide more examples for constructing composites based on thermoset polymers. [ABSTRACT FROM AUTHOR]

Alternating copolymers are crucial for diverse applications. While dispersity (Ð, also known as molecular weight distribution, MWD) influences the properties of polymers, achieving low dispersities in alternating copolymers poses a notable challenge via free radical polymerizations (FRPs). In this work, we demonstrated an unexpected discovery that dispersities are affected by the participation of charge transfer complexes (CTCs) formed between monomer pairs during free radical alternating copolymerization, which have inspired the successful synthesis of various alternating copolymers with low dispersities (>30 examples, Ð=1.13–1.39) under visible‐light irradiation. The synthetic method is compatible with binary, ternary and quaternary alternating copolymerizations and is expandable for both fluorinated and non‐fluorinated monomer pairs. DFT calculations combined with model experiments indicated that CTC‐absent reaction exhibits higher propagation rates and affords fewer radical terminations, which could contribute to low dispersities. Based on the integration of Monte Carlo simulation and Bayesian optimization, we established the relationship map between FRP parameter space and dispersity, further suggested the correlation between low dispersities and higher propagation rates. Our research sheds light on dispersity control via FRPs and creates a novel platform to investigate polymer dispersity through machine learning. [ABSTRACT FROM AUTHOR]

Copyright of Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Controlled radical copolymerizations present attractive avenues to obtain polymers with complicated compositions and sequences. In this work, we report the development of a visible‐light‐driven organocatalyzed controlled copolymerization of fluoroalkenes and acyclic N‐vinylamides for the first time. The approach enables the on‐demand synthesis of a broad scope of amide‐functionalized main‐chain fluoropolymers via novel fluorinated thiocarbamates, facilitating regulations over chemical compositions and alternating fractions by rationally selecting comonomer pairs and ratios. This method allows temporally controlled chain‐growth by external light, and maintains high chain‐end fidelity that promotes facile preparation of block sequences. Notably, the obtained F/N hybrid polymers, upon hydrolysis, afford free amino‐substituted fluoropolymers versatile for post modifications toward various functionalities (e.g. amide, sulfonamide, carbamide, thiocarbamide). We further demonstrate the in situ formation of polymer networks with desirable properties as protective layers on lithium metal anodes, presenting a promising avenue for advancing lithium metal batteries. [ABSTRACT FROM AUTHOR]

Polylactic acid (PLA) is one of promising biocompatible and biodegradable polyester. Poly(2-hydroxyethyl methacrylate) (PHEMA) is a polymer with good hydrophilicity. The hydrophilic PHEMA may improve PLA's amphiphilic properties. Hence, directly starting from hydroxyethyl methacrylate (HEMA), lactic acid (LA), maleic anhydride (MAH) and 2,2'-azobis(2-methyl-propionitrile) (AIBN), a series of new amphiphilic copolymers PLA20MHn were obtained through direct melt polycondensation (DMP) and subsequent free radical polymerization (FRP) in one pot. The results show that PLA20MHn can self-assemble in aqueous solution to form stable spherical micelles and dissolve hydrophobic pyrene molecules. What's more, The CMC value can be adjusted by the polymerization ratio. Therefore, this method is expected to further realize the encapsulation and controlled release of hydrophobic drug molecules for systemic circulation in vivo. [ABSTRACT FROM AUTHOR]

Controlling the structure and chemistry of solid electrolyte interphase (SEI) underpins the stability of electrolyte‐electrode interface, and is crucial for advancing rechargeable lithium metal batteries (LMBs). Here, we utilized photo‐controlled copolymerization to achieve the on‐demand synthesis of fluorosulfonyl fluoropolymers as unprecedented artificial SEI layers on Li metal anodes. This work not only enables instant formation of a hybrid polymer‐inorganic interphase that consists of a polymer‐enriched top layer and a LiF‐fortified bottom layer, originating from a single polymeric component, but also imparts various desirable physical properties (e.g. good mechanical strength and flexibility, high ion conductivity, low overpotential) to SEI via a single‐to‐divergent strategy. Model reactions and structural characterizations supported the formation of a divergent fluorinated interphase, which furnished prolonged stabilization of Li deposition, high coulombic efficiency and improved cycling behavior in electrochemical experiments. This work highlights the great potential of exploring reactive polymers as versatile coatings to stabilize Li metal anodes, providing a promising avenue to solve electrode‐electrolyte interfacial problems for LMBs. [ABSTRACT FROM AUTHOR]

A porous structure of copolymer poly (aniline-co–o-phenylenediamine) has been fabricated by chemical oxidation process with nonionic surfactant Triton X-100. Different ratios of monomers (1:9, 5:5 and 9:1) have been utilized; structure and surface morphology has been analyzed by FTIR and SEM–EDX techniques. The UV, XRD and BET surface area measurement were also done. The electrochemical techniques such as cyclic voltammetry and electrochemical impedance were used to evaluate electrochemical capacitance performances. The copolymer comprising equimolar mixture of monomers displayed high surface area that helps to amplify the diffusion of electrolyte ions. Hence, the specific capacitance of developed copolymer has been determined as 989 F g−1 at 5 mA cm−2 current density from galvanostatic charge–discharge studies with retainability of 84.94% capacitance after 100 cycles. [ABSTRACT FROM AUTHOR]

Polymethyl methacrylate (PMMA) is an important thermoplastic polymer and a versatile lithographic resist. However, the low heat resistance and low dry-etch resistance seriously restricts the application of PMMA in high-end devices and advanced nanolithography. Herein, methyl methacrylate (MMA) was copolymerized with two comonomers 1-adamantyl methacrylate (AdMA) and 1-acryloyloxy-3-hydroxyadamantane (HAdMA), and a series of copolymers P(AdMA-co-MMA) and P(HAdMA-co-MMA) with different contents of HAdMA were prepared. The UV–Vis, ellipsometer, DSC, TG, and TG–MS techniques were employed to investigate the effects of adamantyl and hydroxyadamantyl substituents on the optical and thermal properties of PMMA. The introduced hydroxyadamantyl not only significantly enhanced the refractive index, but also maintained the high transparency and low dispersion of PMMA. The glass transition temperature and thermal stability of PMMA were also greatly improved by the hydroxyadamantyl. The initial decomposition temperature of PMMA increased from 160 to about 260 ℃ after introducing 5% HAdMA. HAdMA was more effective than AdMA in improving the optical and thermal properties of PMMA. The novel P(HAdMA-co-MMA) copolymer has overcome the shortcomings of traditional PMMA and is anticipated to significantly broaden its range of applications. [ABSTRACT FROM AUTHOR]

In this study, condensation polymerization was used to synthesize a number of novel liquid crystal polymers with 1,3,4-oxadiazole rings based on melamine. The new synthesized polymers were characterized by Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1HNMR) spectroscopy. Differential scanning calorimetry (DSC) and optical polarization microscopy (OPM) were used to investigate their liquid crystalline properties. The results demonstrated that throughout a wide temperature range, most of the polymers exhibited columnar (CohX) and nematic (N) liquid crystalline phases. [ABSTRACT FROM AUTHOR]

Soft tissue engineering has focused on green, solvent-free biopolymers with rubber-like characteristics. One of the well-known elastomeric polyesters is polyglycerol sebacate (PGS). The present investigation involves the synthesis of a novel biopolymer composed of PGS-co-poly(ε-caprolactone) (PCL) copolymer, alongside hydroxyapatite (HA) using bovine bone. These synthesized materials were utilized to build scaffolds using 18–22 kV electrospinning. By in situ polymerization, PGS-co-PCL/HA nanocomposites with 5% and 10% hydroxyapatite nanoparticles were developed. Various analysis such as FTIR, TGA, SEM, and DSC were utilized to examine the prepared samples. Introducing 10% HA to the PGS-co-PCL copolymer blends boosted nanocomposite mechanical strength by 300%. Meanwhile, PGS-co-PCL-based samples and their nanocomposites demonstrated promising biocompatibility and antibacterial characteristics. Biodegradability experiments revealed that at pH 7, PGS-co-PCL-HA10% was degraded by 45% within 30 days, whereas at pH 11, degradation accelerated to 65%. This study's findings provide a novel approach for soft tissue engineers to construct effective scaffolds with great biocompatibility and enhanced mechanical properties by combining PGS with co-PCL and adding HA nanoparticles. [ABSTRACT FROM AUTHOR]

Copyright of Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Polypropylene (PP) has recently been actively investigated as a potential power cable insulation substitute for crosslinked polyethylene (XLPE). This is mainly due to PP's higher thermal withstand capability over XLPE. Notably, PP has much higher stiffness than XLPE and therefore needs to be modified with tougher materials to reduce its overall stiffness while maintaining its desirable dielectric properties. To date, many investigations have been conducted on the mechanical and dielectric effects of PP blended with various copolymers. Nevertheless, systematic investigations on the dielectric effects of PP blended with ethylene‐based copolymers having different ethylene contents are less explored. The current work therefore reports on the impact of different ethylene contents of ethylene‐based copolymers on the breakdown performances of PP. The findings reveal that PP blended with a copolymer having a low ethylene content (68.7 wt%) results in at least 11% higher breakdown performance than PP containing a copolymer having a high ethylene content (77.0 wt%). Specifically, PP containing 10 wt% of copolymers having 68.7 wt% of ethylene content results in comparable breakdown performance to XLPE (325 kV mm−1). These results suggest that ethylene‐based copolymers with an appropriately low ethylene content can be blended with PP to achieve desirable breakdown properties. Highlights: PP is blended with copolymers of varying amounts and ethylene contents.PP blended with low amounts of copolymers has good breakdown strength.PP blended with low ethylene level copolymers has favorable breakdown strength.PP blended with copolymers of low ethylene contents is desirable.The breakdown mechanisms are related with the structure and permittivity. [ABSTRACT FROM AUTHOR]

In this work, the corrosion inhibition performance of polyethyleneglycol bisphenol A epichlorohydrin copolymer (PEG-BEC) against mild steel in 1 M HCl was studied by electrochemical and weight loss techniques. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDAX) were applied to characterize the surface morphology of the mild steel samples. The corrosion mitigation efficiency was observed to rise as the concentration of PEG-BEC rises in the corrosive medium while increasing the temperature (25 °C -65 °C) resulting in a drop in the inhibition ability. Furthermore, under hydrodynamic conditions, the corrosion of the mild steel was found to deteriorate both in the absence and presence of PEG-BEC. Just with 10 ppm, an inhibition efficiency (IE) of 97.6% was obtained at 25 °C by EIS. PEG-BEC acts as a mixed-type inhibitor as observed by potentiodynamic polarization (PDP) technique. The observed corrosion inhibition action of PEG-BEC could be ascribed to the adsorption of the molecules and the formation of a protective film on the steel surface as evidenced by static water contact angle (WCA). Langmuir isotherm best describes the PEC-BEG-metal adsorption with large Kads values indicating a thermodynamically stable nature inhibition process. The obtained ∆G°ads = -35.138 to -39.522 kJ/mol indicate that the PEG-BEC spontaneously adsorbed onto the steel with strong tendency to provide protection to the mild steel surface via combination of chemisorption and physisorption processes. The ΔHads -53.07 kJ/mol and ΔSads= +0.048 kJ/mol-k, respectively, suggests an exothermic reaction accompanied by relatively increase in entropy of the PEG-BEC adsorption on the mild steel surface.

Abstracts: Age associated macular degeneration is the 3rd primary cause of blind fundus diseases globally. A reliable and long-lasting method of intraocular drug delivery is still needed. Herein, this study was aim to develop the novel fabrication of ranibizumab loaded co-polymeric nanomicelles (Rabz-CP-NMs) for AMD. The CMC of co-polymeric nanomicelles was determined to be low, at 6.2 μg/ml. The ring copolymerization method was employed to fabricate the NMs and characterize via FTIR, XRD, TEM, DLS and Zeta potential. Rabz-CP-NMs was spherical shape with 10–50 nm in size. Stable and prolonged drug release was achieved with the Rabz from CP-NMs at 48 h. D407 and ARPE19 ocular cell lines showed dose-dependent cell viability with Rabz-CP-NMs. The Rabz-CP-NMs also had less toxicity, higher uptake, lower cell death and prolonged VEGF-A inhibition, as shown by cytoviability assay. Thus, Rabz-CP-NMs were safe for ocular use, suggesting that could be used to improve intraocular AMD treatment.

The aim of the work is to study the effect of the acid comonomer content and forming conditions on the dyeability of gel fibers based on copolymers of acrylonitrile (AN), methyl acrylate (MA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS). For this purpose, model copolymers AN, MA and AMPS were synthesized with an acid comonomer content in the monomer mixture from 0 to 2 % (wt.) by changing the proportion of MA. It has been established that the actual content of the acidic monomer in the fiber-forming copolymer is higher than expected based on the composition of the initial monomer mixture. Analysis of the dyeability of model samples of polyacrylonitrile fibers formed from synthesized copolymers by the dimethylformamide method with varying technological regimes showed that the amount of dye selected from the dye bath by the gel structure of the fibers is proportional to the content of the acid comonomer in the fiber-forming copolymer. The most significant decrease in the whiteness index (lightness) of the finished fibers is observed with an increase in the AMPS content in the copolymer from 0 to 0.7 % (wt.). Microscopy of model fibers was carried out. Based on the experimental data obtained in the course of the work, it was suggested that in order to achieve an acceptable intensity of dyeing and ensure a soft handle of polyacrylonitrile fibers, the optimal content of acid comonomer during the synthesis of fiber-forming copolymers based on AN, MA and AMPS should be in the range of 0.9 up to 1.3 % (of the mass of monomers in the reaction mixture).

Recently, various attempts are being made to design functional material from bioactive polysaccharide to explore their potential for clinical applications. Herein, zwitterionic sulfobetaine and polyvinylpyrrolidone (PVP) functional material was incorporated into bioactive sterculia gum (SG) for developing material in form of network structure hydrogel for use in biomedical applications. Copolymeric films were characterized by FESEM, EDS, AFM, FTIR, 13C NMR, XRD, DSC, mechanical properties & biomedical assay. Antibiotic drug was impregnated into hydrogel to enhance their healing potential for wound. Various biomedical results assessed from biomedical assays revealed their biocompatible & antioxidant nature. Hydrogel material revealed 34.80 ± 0.15 % scavenging ability of DPPH radicals. These dressing demonstrated bioadhesive characteristics and revealed their permeable nature to H2O & O2. Hydrogel dressing demonstrated 0.63 ± 0.02 N mm−2 tensile strength for dressing; 27.58 ± 2.84 N burst strength of materials along with elastic & resilience features were also analyzed. Dressing material revealed antimicrobial property against P. aeruginosa, E.coli. & S. aureus. Diffusion mechanism of cefuroxime was non-Fickian & followed Higuchi kinetic model. In 13C NMR confirmed inclusion of PMEDSAH-PVP onto SG by revealing of peaks around 62.11 ppm on an account of CH2–CH–SO3- of PMEDSAH, and peak at 43.34 ppm is due to carbon of pyrrolidone ring of PVP indicating integration of PVP into copolymeric film. Where in FTIR presence of bands at 1290 cm−1 attributed to C–N vibration of PVP, 1144 cm−1 due to SO3− asymmetric stretching along with band 1651 cm−1 by virtue CO stretching of amide of PVP. Overall these properties revealed that drug encapsulated materials could be utilize for biomedical applications including drug delivery.

AbstractA fluid loss additive (named AAMN) for cementing ultra-deep reservoirs at high temperature (210 °C) was prepared by a free radical copolymerization method using 2-acrylamido-2-methylpropane sulfonic acid (AMPS), acrylamide (AM), acrylic acid (AA), and N-vinyl-2-pyrrolidinone (NVP) as monomers. Filtration tests at 210 °C demonstrated that AAMN reduced the amount of fluid loss by 22% in fresh cement slurry, 23% in 18 wt% NaCl cement slurry, and 16% in 36 wt% NaCl cement slurry compared to AAM (without NVP) when both were added at 6% bwoc ("bwoc" denotes the addition by the weight of the cement). The pore structure was analyzed using the Brenner-Emme-Teller (BET) method and environmental scanning electron microscopy (ESEM), confirming that AAMN could be adsorbed onto the cement particles surfaces, filling the pores and blocking fluid loss channels. The degradation temperatures of the two copolymers were tested by thermogravimetric analysis (TGA-DTGA) and the molecular dynamics behavior of two Amorphous Cell (AC) models (the amorphous structures with randomly arranged Ca2+, Cl−, Na+ and H2O with the AAMN or AAM) built by Materials Studio 7.0 software, were compared: the introduction of five-element NVP side chains didn’t significantly improve the thermal stability of the AAMN relative to the AAM, but resulted in the AAMN molecular chain maintaining a stable geometry at a temperature of 483 K (210 °C). The AAMN also showed more adsorption groups (–SO3− and –COO−) at the high temperatures, which allowed the AAMN to form a dense "network structure" with Ca2+ and H2O molecules, thus effectively blocking the channels for water molecule loss from the cement slurries. [ABSTRACT FROM AUTHOR]

Lithium metal batteries (LMBs) are the best candidates for high‐energy density system. However, the unstable solid electrolyte interphase (SEI) caused by notorious lithium dendrite growth and huge volume fluctuation under practical conditions hinders its commercialization. Here, a functional copolymer composed of monomer is designed with ordered −CF2− groups grafted to viscoelastic backbone to provide homogeneous and self‐adapting in situ LiF‐rich interface. Hence, the robust interface facilitates rapid Li+ flux and suppresses dendritic Li growth. Furthermore, an elastic composite lithium metal anode (FELMA) based on the designed functional copolymer is fabricated through a cost‐effective approach. The FELMA shows excellent cycle stability with ultra‐low volume expansion rate of 0.16% per cycle after 200 cycles at the condition of 3 mA cm−2–3 mAh cm−2. The full batteries assembled with high‐loading LiNi0.8Co0.1Mn0.1O2 (NCM811, 4.1 mAh cm−2) cathode can maintain 80% capacity retention after 320 cycles under N/P = 2.17 and E/C = 2.68 g Ah−1, with the cycling life increased by 220% than Li||NCM811. A prototype 418 Wh kg−1 pouch cell (5.16 Ah) with N/P ratio of 0.88 and E/C ratio of 2.39 g Ah−1 shows stable cycling. [ABSTRACT FROM AUTHOR]

AbstractInspired by leaf lotus effect, superhydrophobic surfaces have developed rapidly in recent years. In this paper, anatase nano TiO2 with particles size of about 70 nm was successfully loaded on the surface of SiO2 by sol-gel method. SiO2 and TiO2 were chemically bonded by Ti-O-Si and constructed a certain micro- and nano-composite structure. After superhydrophobic composite PA-TiO2@SiO2 was obtained by copolymerizing with acrylate and other monomers. The coating was prepared by drop coating plus spraying coating on glass substrates with water contact angles >160° and excellent self-cleaning properties, which could maintain the performance of the superhydrophobic coating by immersion in acidic solutions or water for 2 days. Meanwhile, the coating on the surface of the glass plate at −20 °C significantly delayed the freezing time of the ice. The rough structure of the surface and the presence of fluorine-containing hydrophobic groups gave the superhydrophobic coating an advantage over acrylate polymers in reducing the corrosion rate of steel surfaces. [ABSTRACT FROM AUTHOR]

The need to create safe materials for biomedical and pharmaceutical applications has become a significant driving force for the development of new systems. Therefore, a chitosan-coated copolymer of itaconic acid, acrylic acid, and N-vinyl caprolactam (IT-AA-NVC) was prepared by radical polymerization and subsequent coating via nanoprecipitation to give a system capable of sustained delivery of melatonin. Although melatonin brings undoubted benefits to the human body, aspects of the optimal dose, route, and time of administration for the obtaining of suitable treatment outcomes remain under discussion. The entrapment of melatonin in biocompatible polymeric systems can prevent its oxidation, decrease its toxicity, and provide an increased half-life, resulting in an enhanced pharmacokinetic profile with improved patient compliance. The structures of the biopolymer and conjugate were proven by FTIR, thermal properties were tested by DSC, and the morphologies were followed by SEM. The loading efficiency and in vitro release profile were studied by means of HPLC, and a delayed release profile with an initial burst was obtained. The potential systemic toxicity of the formulation was studied in vivo; a mild hepatotoxicity was observed following administration of the melatonin-loaded formulation to mice, both by histopathology and blood clinical biochemistry. Histopathology showed a mild nephrotoxicity as well; however, kidney clinical biochemistry did not support this. [ABSTRACT FROM AUTHOR]

This research describes the functionalization of polymer-matrix-trapping porphyrins, considering that the transcendental properties of meso-substituted porphyrins, such as optical and chemical stability, combined with the strength of the polymers, can produce photoactive advanced polymeric networks. Polystyrene (PS) and O,O´-bis-(2-aminopropyl)-polyethyleneglycol-300 (2NH2peg300, APEG), or their combination, were used to confine the meso-substituted porphyrin species 5,10,15,20-tetrakis(4'-carboxy-1,1'-biphenyl-4-yl)porphyrin and 5,10,15,20-tetrakis((pyridin-4-yl)phenyl)porphyrin. The samples were characterized by Fourier-transform infrared (FTIR), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) and fluorescence spectroscopies. The absorption and emission properties of the materials were compared to those of their respective porphyrin solutions. The fluorescence was preserved in the obtained composite through a mixture of polymers, PS, and APEG, yielding translucent polymeric networks. Moreover, analysis of individual polymeric assemblies by molecular docking was performed to support the understanding of the experimental findings. This analysis corroborates that the stronger the estimated binding energies, the stronger the interactions that occur between porphyrin and the polymer via non-polar covalent bonds. [ABSTRACT FROM AUTHOR]

In fiber‐reinforced composites, the interfacial bonding between fibers and the matrix is crucial for determining the material's performance. A vacuum‐assisted resin transfer molding (VARTM) process was utilized in this work to fabricate glass fiber fabric‐reinforced polyamide 6 (GFF/PA6) composites through in‐situ polymerization using caprolactam (CL) as the precursor. To enhance the fiber‐matrix interfacial bonding, polyethylene glycol (PEG) was incorporated into the polymerization system, improving the hydrogen bonding between the matrix and fibers. Morphological observations and interface layer analysis revealed that the introduction of PEG resulted in improved interfacial bonding and increased interface layer thickness. Molecular dynamics simulations indicated that the amino formate groups formed by the reaction with PEG exhibited more hydrogen bonds with the hydroxyl groups on the glass fiber surface, thereby promoting interfacial bonding between the matrix and fibers. When the PEG content was 10 wt%, the tensile strength and the elongation at break of the corresponding composite increased by 160% and 300% compared to GFF/PA6 composites without PEG. This study presents a promising strategy for enhancing the fiber‐matrix interfacial bonding by modifying the matrix, offering a prospective approach for developing high‐strength thermoplastic composites. Highlights: GFF/PA6 composites were fabricated via the VARTM method.The addition of PEG for matrix modification improved the interfacial bonding.The modification enhances the hydrogen bonding between the matrix and fibers.Good interfacial bonding can greatly promote the crystallization of the matrix.The composites exhibited a significant increase in strength and toughness. [ABSTRACT FROM AUTHOR]

Toward the end of the century, plastic waste treatment and recycling would be major issue to be addressed. Thus, to overcome the problem of polymer non-biodegradability, study and application of biodegradable polymers is important. Biodegradable polymers are those which can be broken down into smaller oligomers or monomers upon action of radiation, moisture, enzymes and chemicals. Poly(butylene) succinate (PBS) is one of the biodegradable polymers manufactured and studied for a long time. This review majorly focuses on its synthesis, blends, copolymers, composites, biodegradation studies, applications and processability. PBS copolymers are synthesized using multiple approaches such as monomer, polymer and application based. PBS blends are studied with PP, poly(propylene carbonate), Soy protein isolate and poly(lactic) acid. The PBS and its blends find its application in agricultural films, packaging, tableware, and biomedical applications. PBS composites were prepared using synthetic organic, inorganic fillers and bio-based fillers to improve its mechanical performance, flame retardancy, biodegradabilit,y etc., based on type of reinforcement. Biodegradability is one the property of PBS which will help in maintaining circular economy and sustainability. [ABSTRACT FROM AUTHOR]

The molecular structure and application properties of four types of acrylamide polymers were summarized, such as anionic polymer, cationic polymer, zationic polymer of polymer and nonionic polymer, and put forward suggestions for the development of heat-resistant acid thickener. It is expected to provide a reference for the development and utilization of deep high temperature, low permeability and extremely low permeability unconventional oil and gas fields. [ABSTRACT FROM AUTHOR]

Copolymers were obtained in this work and the methodology for their synthesis was worked out. Various fillers were selected for the polymer coating. Resulting copolymers have good adhesion required for composite protective coatings. An experiment was conducted to determine the corrosion resistance of metals coated with copolymers when exposed to aggressive environments, as well as to determine the hardness and thickness of the polymer coatings obtained. It was found that the polymer coating filled with bronze powder, despite the small thickness of 43.4 µm, has the best adhesion and corrosion properties, as well as having the highest hardness values of 80.5 HB. Such physical and mechanical properties of polymer coatings allow them to be used as protective coatings for metal products working under the influence of aggressive media. [ABSTRACT FROM AUTHOR]

High temperature proton exchange membrane (HT-PEM) is a core component for high temperature proton exchange membrane fuel cells (HT-PEMFCs). Although phosphoric acid (PA) doped polybenzimidazole (PBI) membranes are widely applied in HT-PEMFCs, the synthetic procedure is rather tough and the carcinogenic monomer should be used. Thus, it is of significance to obtain cheaper and easily prepared HT-PEMs with moderate physicochemical properties and good fuel cell performance. Herein, using a straightforward Friedel-Crafts reaction between 4-acetylpyridine, biphenyl and para -terphenyl, a series of poly(biphenyl- co -terphenyl pyridine) copolymers (Co- x %BP- y %TP) are developed. The obtained Co- x %BP- y %TP membranes exhibit excellent capability of absorbing PA owing to the existence of pyridine units in polymers, and meanwhile PA absorption capacity of membranes increase with the increased percentage of the biphenyl moiety in copolymers. Through immersing in 85 wt% PA at 100 °C, the Co–25%BP-75%TP membrane achieves a PA uptake of 274%, displays a moderate tensile strength of 4.7 MPa and possesses a high conductivity of 0.099 S cm−1 at 180 °C. Consequently, under 200 °C and no backpressure condition, the peak power density of the H 2 –O 2 cell equipped with Co–25%BP-75%TP/274%PA membrane reached a high value of 773 mW cm−2, demonstrating a big potential to be operated in HT-PEMFCs. • Series of poly(biphenyl- co -terphenyl pyridine) copolymers are synthesized through one-step polymerization. • Co–25%BP-75%TP/274%PA shows a high conductivity of 0.099 S cm−1 at 180 °C. • HT-PEMFCl with Co–25%BP-75%TP/274%PA exhibits a high peak power density of 773 mW cm−2 at 200 °C. [ABSTRACT FROM AUTHOR]

Dispersants play a significant role in the formulation of positive battery slurry. Adding a small amount of dispersant can effectively reduce the viscosity of the slurry, which is beneficial for the production of positive batteries. A series of copolymers of N‐vinylpyrrolidone (NVP) and 2‐ethylhexyl acrylate (2‐EHA) with different molar ratios of NVP to 2‐EHA, different polymer molecular weights and different polymer structures are synthesized by dl‐methionine‐mediated reversible deactivation radical polymerization. The ability of these copolymers to disperse LiFePO4 battery positive slurry with a high solid content (57.08%) as dispersants has been evaluated. Research shows that when the ratio of NVP to 2‐EHA is 20 and the polymer molecular weight is 6000, poly(N‐vinylpyrrolidone‐ran‐2‐ethylhexyl acrylate) (NVP‐ran‐2‐EHA) exhibits the strongest dispersing ability to the slurry. This polymer can reduce the viscosity of the slurry by 43.925% and has the longest stabilization time of 3 h, which is better than poly(N‐vinylpyrrolidone) (PVP) and poly(N‐vinylpyrrolidone)‐block‐poly(2‐ethylhexyl acrylate) (PVP‐b‐PEHA) with the same molecular weight. [ABSTRACT FROM AUTHOR]