共聚酯
结晶
材料科学
共聚物
流变学
对苯二甲酸
熔融纺丝
热稳定性
纤维
化学工程
纺纱
傅里叶变换红外光谱
化学结构
小角X射线散射
高分子化学
聚合物
聚酯纤维
化学
复合材料
有机化学
散射
工程类
物理
光学
作者
Zhihao Zhang,Jialiang Zhou,Senlong Yu,Lifei Wei,Zexu Hu,Hengxue Xiang,Meifang Zhu
标识
DOI:10.1016/j.ijbiomac.2022.12.088
摘要
The fabrication of bio-based copolyester fiber with adjustable crystallization, orientation structure and mechanical property still remains a great challenge. In this study, a series of copolyester fibers based on terephthalic acid (PTA), ethylene glycol (EG) and l-Lactide (L-LA) were prepared via melt copolymerization and spinning. The resultant PLA-co-PET (PETLA) fibers exhibited tunable structure and property due to the synergistic effects of chemical structure and drawing process. The chemical structure of PETLA was confirmed by NMR, FTIR and XRD, which suggested that the random degree of copolymer increased with LA content and the viscosity decreased with the increase of LA content. The crystallization behavior, melting characteristic, thermal stability and rheological property were investigated by DSC, TGA and rheometer, the results indicated that all the PETLA exhibited the crystallization capacity, melting temperature and thermal stability were slightly affected by LA segment. The synergistic effects of LA segment and spinning process on PETLA structure and property were analyzed by WAXD and SAXS. The breaking strength of PETLA fibers dropped from 5.3 cN/dtex of PET to 2.8 cN/dtex of PET85LA15, which still met the requirements of most textile applications. Therefore, our work presented a feasible approach to prepare bio-based polyester fibers with tunable property.
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