PLA/LLDPE共混体系反应性增容研究Study on Reactive Compatibilization of PLA/LLDPE Blends
王晓婷,唐颂超,潘泳康,王庆海
摘要(Abstract)：
在聚乳酸(PLA)中加入线性低密度聚乙烯(LLDPE)进行增韧,并通过相容剂LLDPE接枝甲基丙烯酸缩水甘油酯-苯乙烯共聚物[LLDPE-g-(GMA-co-St)]和弹性体乙烯-甲基丙烯酸-甲基丙烯酸缩水甘油酯(E-MA-GMA)增容PLA和LLDPE。用红外光谱、动态流变和SEM对共混物进行了表征,测试了共混物的力学性能。结果表明,LLDPE-g-(GMA-co-St)和E-MA-GMA的加入都能明显提高PLA/LLDPE的冲击韧性,起到了反应性增容的作用,使共混体系的分散相尺寸明显减小,分布均匀,共混物的动态损耗模量G"增加。与LLDPE-g-(GMA-co-St)相比,加入E-MA-GMA的共混物中分散相粒径更加细微。
关键词(KeyWords)： 聚乳酸;线性低密度聚乙烯;甲基丙烯酸缩水甘油酯;增韧;相容性
基金项目(Foundation):
作者(Author): 王晓婷,唐颂超,潘泳康,王庆海
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