基于对羟基苯丙酸的生物基液晶共聚酯纤维的合成与性能  

Synthesis and properties of bio-based liquid crystal copolyester fiber based on p-hydroxyphenyl propionic acid

作　　者：李龙龙 魏朋 吴萃霞 闫金飞 娄贺娟 张一风[1,2] 夏于旻 王燕萍[3] 王依民[3] LI Longlong;WEI Peng;WU Cuixia;YAN Jinfei;LOU Hejuan;ZHANG Yifeng;XIA Yumin;WANG Yanping;WANG Yimin(College of Textiles, Zhongyuan University of Technology, Zhengzhou, Henan 450007, China;Henan Collaborative Innovation Center of Textile and Garment Industry, Zhengzhou, Henan 450007, China;College of Materials Science and Engineering, Donghua University, Shanghai 201620, China)

机构地区：[1]中原工学院纺织学院,河南郑州450007 [2]纺织服装产业河南省协同创新中心,河南郑州450007 [3]东华大学材料科学与工程学院,上海201620

出　　处：《纺织学报》2022年第1期9-14,共6页Journal of Textile Research

基　　金：国家自然科学基金项目(51803246);河南省高校科技创新人才支持计划资助项目(22HASTIT032);河南省高等学校青年骨干教师培养计划项目(2020GGJS140);中原工学院基本科研业务费专项资金资助项目(K2020YY005)。

摘　　要：针对常规生物基纤维力学性能与耐热性不足的问题,以6-羟基-2-萘甲酸、对羟基苯甲酸和对羟基苯丙酸(HPPA)为原料,采用一锅熔融聚合法合成了生物基液晶共聚酯,并通过熔融纺丝制备得到初生纤维,对共聚酯及其初生纤维的结构与性能进行研究。结果表明:制备得到的生物基液晶共聚酯为向列型液晶,其熔点在200℃左右,并随着HPPA添加量的增加而降低,而高HPPA添加量会导致共聚酯熔融行为不明显,不利于结晶;共聚酯具有良好的热稳定性,其质量损失5%时对应的温度高于370℃,在700℃时的残炭率大于30%;共聚酯初生纤维表面光滑均匀,断面具有明显的原纤结构,力学性能较好,并与HPPA的添加量呈负相关关系。In order to improve the mechanical property and thermal stability of bio-based polymers,the bio-based liquid crystal copolyester derived from 6-hydroxy-2-naphthenic acid,p-hydroxybenzoic acid and p-hydroxyphenyl propionic acid(HPPA)were studied and successfully synthesized via the one-pot melt polymerization method,and the structures and properties of the spun fibers from the bio-based liquid crystal copolyesters were prepared by melt spinning.The results show that the prepared bio-based liquid crystal copolyester is a nematic liquid crystal polymer.Its melting point is around 200℃,and it decreases with the increase of HPPA monomer content.High content of HPPA leads to weak melting behavior,which is not conducive to crystallization.The copolyesters show good thermal stability and high char yield,and the temperature corresponded to 5%weight loss and char yield at 700℃are above 370℃and 30%,respectively.The surface of the as spun copolyester fiber is smooth and uniform,the cross section has an obvious fibrillar structure.The fibers have good mechanical properties,which are negatively related to the content of HPPA.

关 键 词：生物基液晶高分子 熔融聚合 熔融纺丝 对羟基苯丙酸 生物基纤维 共聚酯纤维 

分 类 号：O632[理学—高分子化学]