聚碳酸亚环己酯的热分解性能及动力学  

Thermal Decomposition Behaviour and Kinetics of Poly(Cyclohexenylene Carbonate)

作　　者：罗建新[1,2] 张敏[1] 邹志强[1,2] 刘保华[1] 陈立班[1] 

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院研究生院,北京100039

出　　处：《高分子材料科学与工程》2009年第5期86-88,92,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20274053);广州市科技攻关项目(2007z3-D0261)

摘　　要：研究了聚碳酸亚环己酯(二氧化碳-氧化环己烯共聚物,简称PCHC)的非等温热分解行为的影响因素,并对热分解反应动力学及机理进行了研究。结果表明,碳酸酯键含量和升温速率等都对PCHC的热分解行为有较大影响;高交替度的PCHC在350℃左右完全分解,不残留炭黑,具有优良的热分解性能。用Flynn-Wall-Ozawa和Kinssinger两种方法求得PCHC的热分解反应的表观活化能分别为144.51kJ/mol和143.23kJ/mol。并结合Coats-Redfern方法证明了PCHC的热分解为随机核化机理。The thermal decomposition behaviour of CO2-Cyclohexene oxide （CHO） copolymer poly （ eyclohexene carbonate） （PCHC）） synthesized with varying carbonate content was studied by thermogravimetric analysis （TG） techniques. The influence of the carbonate content, and heating rate on the thermal decomposition behaviour was investigated in detail. The thermogravimetry curves of PCHC confirm two weight-loss steps. The kinetics of the thermal decomposition process were investigated with different kinetic methods （Kinssinger and Flynn-Wall-Ozawa method） with data from TG analysis under dynamic conditions. The apparent activation energies of the main thermal decomposition step of the PCHC thermal decomposition calculated with the two methods, about 144.51 kJ/mol and 143.23 kJ/mol, were in good agreement with each other. The solid-state decomposition process is a Sigmoidal A2 type in terms of the Coats-Redfern results.

关 键 词：二氧化碳 聚碳酸亚环己酯 活化能 热分解 

分 类 号：O631.31[理学—高分子化学]