Journal of Industrial and Engineering Chemistry, Vol.100, 119-125, August, 2021
Synthesis and unique characteristics of biobased high Tg copolyesters with improved performance properties for flexible electronics and packaging applications
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The synthesis and characterization of two series of biobased novel poly(1,4-cyclohexylenedimethylene terephthalate-co-1,4-cyclohexylene dimethylene 2,6-naphthalenedicarboxylate) copolyesters containing isosorbide (ISB) content (PCITN) ranging from 0 to 11 mol% relative to the total diol amount was carried out in this study. The Novel PCITN was containing 2,6-naphthalenedicarboxylic acid (NDA) content ranging from 0 to 100 mol% relative to the total diacid amount. The synthesized PCITN were thoroughly characterized for their actual chemical composition, molecular weight, thermal properties, thermal stability, dimensional stability, transmittance (%), and birefringence. All the copolyesters showed the characteristics of random copolyesters and their composition and thermal properties could be controlled by the molar feed ratio of diol and diacid moieties. Results indicate that ISB significantly improves the glass transition temperature (Tg) of resultant copolyesters. It was also found that synthesized copolyesters have a high Tg and wide processing window compared to conventional homopolyesters. Exceptional performance properties: such as high Tg, Tm, high thermal stability, dimensional stability, good moisture barrier, good transmittance, and low birefringence of fabricated PCI6TN70 film, make it suitable for versatile industrial applications especially for biomedical, packaging, and optical applications.
Keywords:Biobased copolyester;Semi-crystalline polymer;Isosorbide;Thermal stability;Glass transition temperature;Processing window;Flexible optical devices
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