Sb/Ti复配催化半光聚酯热降解动力学研究  

Thermal degradation kinetics of semi-dulling polyester chips with Sb/Ti catalyst

作　　者：戴钧明[1,2] 王玉合[1] 张忠安[1] 王树霞[1,2] 司虎[1] 

机构地区：[1]中国石化仪征化纤有限责任公司,江苏仪征211900 [2]江苏省高性能纤维重点实验室,江苏仪征211900

出　　处：《合成技术及应用》2016年第1期1-6,共6页Synthetic Technology & Application

摘　　要：通过热失重（TGA）、Friedman方法、Chang方法系统研究了5种Sb/Ti复配催化剂（Sb/Ti配比分别为：100/0、75/25、50/50、25/75、0/100）合成半光聚酯PET（聚对苯二甲酸乙二醇酯）于氮气气氛下的热稳定性能及热降解动力学。热失重研究表明：失重1%时全钛聚酯失重温度比全锑的高,其他复配比例聚酯的失重温度处于二者之间;失重5%~50%时的失重温度,复配的均与锑相当,全钛的最低;通过Friedman法和Chang法求得热降解动力学参数：分解反应活化能E和反应级数n,结果表明,随着Sb/Ti复配催化剂中Ti比例的升高,E和n均呈下降趋势,聚酯的热稳定性下降。The thermal degradation kinetics of semi- dulling polyester chips was studied systematically through the methods of TGA,Friedman and Chang under nitrogen atmosphere（ with five different compound catalysts matching ratios： Sb/Ti = 100/0,75/25,50/50,25/75 and 0/100）. The results of TGA showed that the decomposition temperature of Ti- catalyst polyester was higher than that of Sb- catalyst polyester at weightlessness1%,and other polyester＇s decomposition temperatures were in the temperature range between Ti- catalyst polyester＇s and Sb- catalyst polyester＇s. And the decomposition temperature of Ti- catalyst polyester was the lowest one at weightlessness 5% ~ 50%,other polyester＇s temperatures were all approaching the decomposition temperature of Sb- catalyst polyester＇s temperature. The results of thermal degradation kinetic suggested that the decomposition reaction series n,decomposition activation energy E all manifest their declining trend with Ti＇s proportion increasing,which mean the thermal stability of the polyester declines.

关 键 词：PET聚酯 半消光 锑/钛复配催化剂 热降解 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业] O643.36[理学—物理化学]