生物基PTT合成及非等温结晶动力学研究Synthesis and Non-Isothermal Crystallization Kinetics of Bio-Based PTT
董海良,杨新华,王凯
DONG Hai-liang,YANG Xin-hua,WANG Kai
摘要(Abstract)：
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.
关键词(KeyWords)：
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
基金项目(Foundation): 萧山区领军型创新创业团队项目(2020503)
作者(Author):
董海良,杨新华,王凯
DONG Hai-liang,YANG Xin-hua,WANG Kai
DOI: 10.16090/j.cnki.hcxw.2022.07.005
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