基于TG/FT-IR,Py-GC/MS的聚乳酸塑料热降解研究Devolatilization of PLA Investigated by TG/FT-IR, Py-GC/MS Analysis
王刚,李爱民,李建丰
摘要(Abstract)：
采用TG/FT-IR、Py-GC/MS联用技术研究了可降解塑料聚乳酸的气体释放过程及其热解产物。研究表明,聚乳酸在320～370℃区间发生剧烈热解反应,DTG曲线在359℃时出现最大值。热解气体的逸出情况由FT-IR进行实时检测,并且定性分析了CH4,CO2,CO和有机物等产物的析出情况。通过比较TG/DTG曲线和FT-IR数据,发现DTG和FT-IR分析结果较为一致。Py-GC/MS联用技术用来分析聚乳酸热解产物,结果表明醛、酮、酯及低聚物是主要降解产物。Py-GC/MS方法快速、简便、准确,不失为聚合物热解研究的良好方法。
关键词(KeyWords)： 聚乳酸;热解;TGA/FT-IR;Py-GC/MS
基金项目(Foundation):
作者(Author): 王刚,李爱民,李建丰
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