PET-co-PGA共聚酯的性能及可纺性研究  

Preparation and spinnability of PET-co-PGA copolyesters

作　　者：西亚堃 徐寒松 张晓彤 张旭 李曼婕 丁远蓉[1] 朱新生[1] Xi Yakun;Xu Hansong;Zhang Xiaotong;Zhang Xu;Li Manjie;Ding Yuanrong;Zhu Xinsheng(Faculty of Textile and Clothing Engineering, Soochow University, Suzhou Jiangsu 215021, China;Molecon(Suzhou)New Materials Co., Ltd., Suzhou Jiangsu 215126, China)

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021 [2]苏州莫立克新型材料有限公司,江苏苏州215126

出　　处：《合成技术及应用》2020年第3期10-15,共6页Synthetic Technology & Application

基　　金：苏州大学“大学生创新创业训练计划”(20180285039Z);江苏省教育厅财政资助。

摘　　要：聚乙醇酸酯(PGA)在自然环境下快速降解而不易储存,难以进一步开发利用,共缩聚成为抑制其降解的重要途径之一。本文将对苯二甲酸(TPA)、乙二醇(EG)与PGA进行熔融缩聚反应而生成共聚酯(PET-co-PGA),探讨了PET-co-PGA基本性能以及碱降解性,研究了PET-co-PGA及纳米粒子改性共聚酯的熔纺性。试验结果表明:当PET-co-PGA中PET含量为87%时,特性黏度为0.805 dL/g,端羧基含量为38.7 mmol/kg,玻璃化温度为64.8℃,熔点为185.0℃,结晶度为2.8%。用2M NaOH水溶液于80℃下处理4 h后,共聚酯碱降解率为82.4%。共聚酯纤维断裂强度为1.4 cN/dtex,纤度为19.4 dtex。添加质量分数1.5%纳米TiO2后,改性共聚酯断裂强度为1.5 cN/dtex,纤度为10.6 dtex,PET-co-PGA表现出良好的熔纺性。共聚酯粉碎和纳米粒子增强改性均改善了共聚酯可纺性。Polyglycolic acid ester(PGA)is not easy to store and find applications because of its fast degradation in natural environment.The copolyester PET-co-PGA was synthesized by melt polycondensation and transesterification with terephthalic acid,ethylene glycol and PGA.The basic properties of PET-co-PGA copolyester,such as intrinsic viscosity,carboxylic content,crystallization and alkali degradation were discussed.The melt spinning performances of the copolyester and the nanoparticle-dosed one were investigated.The results showed that the copolyester intrinsic viscosity was 0.805 dL/g,the end carboxyl content was 38.7 mmol/kg,while its color values were L 37.44,a 12.9,b 31.66 at the content of PET 87%.The glass transition temperature was 64.8℃,the melting point was 185.0℃and the crystallinity was 2.8%.The alkaline degradation rate of the copolyester was 82.4%whereas that of pure PET was 10%after being treated with 2 M NaOH solution at 80℃for 4 hours.The tensile strength of the fiber drawn at 65℃was 1.4 cN/dtex at its denier of 19.4 dtex.After being dosed 1.5%nano-TiO2 and drawn at 75℃,the tensile strength was 1.5 cN/dtex at the denier of 10.6 dtex.The spinnability of the copolyesteris improved by grinding and adding nanoparticles.

关 键 词：共聚酯 聚乙醇酸酯 酯交换 缩聚 熔体纺丝 纳米粒子 

分 类 号：TQ322[化学工程—合成树脂塑料工业]