摘要
用质谱和热重分析方法,对降解机理和影响因素进行了探讨。数据表明:CO_2-环氧丙烷共聚物的热分解可遵循两种途径进行:山链端开始的“解拉链”,或在链中发生的无规降解。对共聚物进行提纯,封端,或用三元共聚法制备,可以有效地改善其热稳定性。
The thermal degradation of CO_2—epoxide copolymers was studied by MS and TG measurements and found to involve both 'unzipping' and random chain scission processes. Such processes were diminished to some extent by either enhancement of the molecular weight, removal of the residual catalysts,' end capping', and introducing structural units other than alkylene and carbonate groups. The thermostability of the copolymers was thus improved and might satisfy ordinary processing and applications.
出处
《石油化工》
CAS
CSCD
北大核心
1993年第11期730-734,共5页
Petrochemical Technology
基金
国家自然科学基金
关键词
二氧化碳
环氧丙烷
共聚物
carbon dioxide, propylene oxide, polymers, thermostability
