Thermal Stability of Bio‐Based Aliphatic‐Semiaromatic Copolyester for Melt‐Spun Fibers with Excellent Mechanical Properties
Thermal Stability of Bio‐Based Aliphatic‐Semiaromatic Copolyester for Melt‐Spun Fibers with Excellent Mechanical Properties
复制标题
具有优异机械性能的熔纺纤维用生物基脂肪族半芳香族共聚酯的热稳定性
DOI：
10.1002/marc.202000498
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发表时间：
2021
影响因子：
4.6
通讯作者：
Meifang Zhu
中科院分区：
文献类型：
--
作者：
Jialiang Zhou;Qingqing Zhu;Pan Weinan;Meifang Zhu;Zexu Hu;Meifang Zhu
Flexible aliphatic poly(lactic acid) is introduced into polyethylene terephthalate through copolymerization to prepare biodegradable copolyester, which aims to solve the non-degradability of polyethylene terephthalate (PET) and realize the greening of raw materials. In this work, poly(ethylene terephthalate-co-lactic acid) random copolyesters (PETLAs) of lactic acid composition from 10 to 50% is synthesized via one-pot method. The chemical structure and composition, thermal property, and crystallization property of prepared PETLAs resin are characterized. The results shows that the introduction of LA segment forms random copolyester, and the flexible LA segment results in slight decrease in the glass transition temperatures (Tg ), melting point (Tm ), and crystallinity (Xc ) of the copolyesters. The thermal stability of PETLAs is better, and the initial decomposition temperature of PETLA-10 can reach 394°C. The PETLAs resin exhibits good processability, and PETLAs fibers are prepared by melt spinning. The strength of PETLA-10 fiber can reach 260MPa after drawing treatment, and the elongation at break can reach 130%. Taking advantage of their features, PETLAs as an innovative bio-based polymer are expected to achieve ecofriendly applications in the fields of fiber, plastic, and film.
