文献类型：期刊文献

中文题名：芳基乙炔聚合物热分解动力学研究

英文题名：Thermal Degradation Kinetics of Polyarylacetylene

作者：丁学文[1];黄云波[1];庄元其[1];王俊[1];徐柏华[1];焦扬声[1]

机构：[1]华东理工大学功能复合材料教研室,上海200237

年份：2000

卷号：13

期号：3

起止页码：274

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：芳基乙炔聚合物;热分解动力学;对二乙炔基苯

外文关键词：polyarylacetylene; thermal degradation; kinetics of thermal degradation; p-diethynylbenzene

摘要：利用TG -DTG方法研究了聚 (p-DEB)在氮气和空气气氛中的热分解过程和动力学。实验发现 ,在氮气中其热分解反应为一步反应 ,热分解速率较低 ,热分解温度随升温速率 β的增加而线性增加 ,在730℃下残碳率高达 87% ;而在空气中其热分解反应则由多步组成 ,热分解速率较快 ,热分解温度偏低 ,升温速率对热分解温度影响不大 ,在 6 0 0℃下聚合物已完全分解。在氮气和空气中聚合物的热分解反应均为一级反应 ,其热分解活化能分别为 2 1 3.5 8kJ/mol和 2 38.6 7kJ/mol;其 6 0s寿命温度分别为 6 2 4℃和 473℃。
By using TG and DTG, the processes and kinetics of the thermal degradation of poly(p DEB) in N 2 or in air have been studied. The effects of the atmospheres on the process, degradation temperatures, degrees of degradation and the kinetics of degradation have been analyzed. It has been found that the process of the thermal degradation in N 2 is one step, but the oxidative degradation in air is composed of multiple steps. The degradation temperatures are higher than that in air; the apparent degradation reaction orders are 1.0 both of in N 2 and in air. The degradation activation energy are 213.58 kJ/mol and 238.67 kJ/mol; the 60 s temperatures were 624 ℃ and 473 ℃ in N 2 and in air respectively.