Monofilaments of isosorbide-based tetrapolyesters with enhanced (bio)degradability prepared by a solid-state drawing process: Synthesis and struture-property relations

• Published in: Giant (Oxford, England) Vol. 18; p. 100281
• Main Authors: Li, Zhenguang, Wang, Yaning, Xu, Jielin, Wu, Jing, Wang, Huaping
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2024; Elsevier
• Subjects: Biodegradable polymers; Enzymatic degradation; Isohexides; Isosorbide; Monofilament; Isohexides; Enzymatic degradation; Isosorbide; Biodegradable polymers; Monofilament
• ISSN: 2666-5425; 2666-5425
• DOI: 10.1016/j.giant.2024.100281

To enhance the degradation rate of poly (butylene adipate-co-terephthalate) (PBAT) in the natural environment and to investigate the effect of modified monomers on the molding and structure of copolyester fibers, a series of isosorbide modified PBAT (PBIAT) tetrapolyesters were synthesized and monofilaments were prepared by solid-state drawing in this work. The experimental results revealed that the introduction of isosorbide formed a partial block structure in the molecular chain, and that a significant improvement in the properties of heat resistance and degradability of the copolyester was observed with the introduction of isosorbide. In the research of fiber forming and structure-property relationship by isosorbide, it was found that although the monofilament orientation process was affected by the V-shape structure of isosorbide, the change of the crystal structure under stress was similar to that of polybutylene terephthalate (PBT). The PBIAT monofilaments showed a decrease in the strength at break affected by the introduction of isosorbide but they still met the requirements for textile applications. [Display omitted]