通过反应挤出制备马来酸酐接枝聚甲基乙撑碳酸酯(PPC-g-MA),采用红外光谱分析、滴定法、溶液黏度测试等方法表征了PPC-g-MA的结构,通过热重分析和稳态粘弹流变性能测试,研究了接枝物的热性能,分析了PPC-g-MA,结构与热性能的关系.PPC-g-MA的红外谱图显示在1640 cm-1处出现碳碳双键伸缩振动吸收峰,说明MA成功接枝到PPC主链上.MA添加量由0.5 phr增加至5 phr,PPC-g-MA的接枝率、特性黏度和热稳定性先提高后降低.当MA添加量为0.5 phr时,PPC-g-MA的接枝率为0.224％,此时产物的初始分解温度(T-5％)比纯PPC升高了8.2℃,特性黏度提高了1.22,复数黏度降低10％所消耗的时间延长了1875 s;当MA添加量增加到1 phr时,PPC-g-MA的接枝率和T-5％同时达到最大值,分别为0.284％和264.8℃.研究表明当MA添加量低于1 phr时,产物的接枝率和特性黏度高,可提高PPC热性能.
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