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Copyright of Polimery is the property of Industrial Chemistry 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.)

Chitosan derivatives with a series of fatty acids (FA) have been developed using simultaneous N- and O-acylation reaction by the combination of two ways of conducting the reaction, i.e. a carbodiimide catalysis and ionic amino group protection. The chemical structure of chitosan derivatives as well as the characterization of the FA substitution degree were done by the IR spectra analysis. The correlation between the substitution of the chitosan functional groups as well as the saturation of FA and the changes of structural and thermal properties of the derivatives has been presented. [ABSTRACT FROM AUTHOR]

Copyright of Polimery is the property of Industrial Chemistry 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.)

Copyright of Polimery is the property of Industrial Chemistry 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.)

Two series of furan-based copolymers, by means of poly(esters-ethers) (PEEs) and poly(ester-amide-ethers) (PEAEs) with various content of ether-containing blocks, have been prepared using two-stage melt polycondensation process. The molecular structure of the synthesized materials has been analyzed by Proton Nuclear Magnetic Resonance (1H NMR) and Fourier Transform Infrared (FTIR) spectroscopies. In order to evaluate phase transition temperatures, as well as the thermal effects in the synthesized series of copolymers, Differential Scanning Calorimetry (DSC), Dynamic Mechanical Thermal Analysis (DMTA), and Thermogravimetric Analysis (TGA), have been performed. The synthesized copolymers exhibit a good combination of mechanical and processing properties, which resulted from high molecular masses (confirmed by Size Exclusion Chromatography (SEC) and Limited Viscosity Number (LVN)). The incorporation of both PPAF and PTMO segments into PTF affected the ability of PTF for cold crystallization, while the introduction of the amide sequences alone, influenced the overall stiffness of the system: higher values of glass transition (T g) and hardness. Additionally, the obtained PEEs and PEAEs do not undergo crystallization during cooling from the melt. One confirmed that the addition of PTMO had a significant effect on thermal and thermo-oxidative stability and tensile and cyclic properties. In addition, when comparing the PEE series with the PEAE series with the same PTMO content (50 wt%), it was shown that PEE 50/50 has about 3.1 and 1.25 times higher value of E compared to PEAE 50/50 at a crosshead speed rate of 5 and 100 mm/min, resulted from higher X c (investigated by XRD analysis). [Display omitted] • Furan-based sustainable copolymer were prepared by melt polycondensation. • Copolymers exhibit a good combination of mechanical and processing properties. • Strong effect from the incorporation of amide and ether segments was confirmed • Amide segments caused chain stiffening and thus hindering the crystallization. [ABSTRACT FROM AUTHOR]