摘要
以精对苯二甲酸(PTA)、生物基1,3-丙二醇(1,3-PDO)为原料,通过直接酯化法缩聚工艺路线制备了生物基聚对苯二甲酸丙二醇酯(PTT)。使用核磁共振氢谱仪分析PTT的结构,借助乌氏黏度计和差示扫描量热仪测试了PTT的特性黏度和非等温结晶性能,并采用Jeziorny法研究了PTT的非等温结晶动力学。结果表明:当缩聚温度为260℃时,PTT的特性黏度达到1.04 dL/g,之后随缩聚温度的提高,特性黏度下降;核磁结构分析证明成功制备了PTT聚合物;非等温结晶动力学常数随降温速率的增大而增大,半结晶时间随降温速率的增大而降低。
Bio-based polytrimethylene terephthalate(PTT) was prepared by esterification polycondensation process using terephthalic acid(PTA) and bio-based 1,3-propanediol(1,3-PDO) as raw materials. The structure of PTT was analyzed by nuclear magnetic resonance hydrogen spectroscopy, the intrinsic viscosity was measured with an Ubbelohde viscometer, and non-isothermal crystallization properties of PTT were measured by differential scanning calorimetry, and the non-isothermal crystallization kinetics of PTT was studied by Jeziorny method. The results show that the intrinsic viscosity of PTT reaches 1.04 dL/g when the polycondensation temperature is 260 ℃, after that, with the increase of polycondensation temperature, the intrinsic viscosity decreases. The nuclear magnetic resonance proves that PTT polymer is successfully prepared. The kinetic constants the non-isothermal crystallization increases with the enhancement of cooling rate, and the half-time of crystallization decreases with the increase of cooling rate.
作者
董海良
杨新华
王凯
DONG Hai-liang;YANG Xin-hua;WANG Kai(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China;Zhejiang Hengyi Petrochemical Research Institute Co.,Ltd.,Hangzhou 310000,Zhejiang,China)
出处
《合成纤维》
CAS
2022年第7期1-4,9,共5页
Synthetic Fiber in China
基金
萧山区领军型创新创业团队项目(2020503)。
关键词
聚对苯二甲酸丙二醇酯
合成
非等温结晶动力学
polytrimethyene terephthalate
synthesis
non-isothermal crystallization kinetics
