原位增容HDPE/PET共混体系反应挤出形态结构的研究  

Study on Morphology of In situ Compatibilized HDPE/PET Blend

作　　者：何慧[1] 沈家瑞[1] 

机构地区：[1]华南理工大学高分子系

出　　处：《塑料工业》1998年第6期28-30,共3页China Plastics Industry

摘　　要：通过扫描电镜照片（ＳＥＭ）研究了ＨＤＰＥ／ＰＥＴ共混体系在双螺杆反应挤出过程中，共混合金冲击断面的形态特征。结果表明，增容剂ＥＶＡ或ＥＡＡ均对ＨＤＰＥ／ＰＥＴ共混体系具有一定的增容作用；使分散相颗粒减小，且变得较为均匀，两相界面变得模糊，界面粘结力增强。其中，ＥＡＡ的增容效果优于ＥＶＡ。在此增容的基础上，选用有机化合物Ｄ作为催化剂，在熔融加工的过程中，使ＰＥＴ与ＥＶＡ或ＥＡＡ发生酯交换或酸－酯交换反应，生成ＰＥＴ－ＥＶＡ或ＰＥＴ－ＥＡＡ接枝共聚物，达到了原位增容ＨＤＰＥ／ＰＥＴ共混体系的目的，从而进一步改善了体系的相容性。The morphologies of impact fractured surface of HDPE/PET blends during the reaction processing in a twin screw extrudex were studied by SEM.The results showed that compatibilizers EVA and EAA improved the compatibility of HDPE/PET blend,decreasing the dispersed particle size,and resulting in good adhesion between the phases of HDPE and PET,in which the effect of EAA was better than that of EVA.In the presence of organic metallic compound catalyst in the melt processing,the graft copolymer of PET EVA or PET EAA was generated by ester exchange or ester acid exchange reaction between PET and EVA or EAA,resulting in in situ compatibilized HDPE/PET blend,improving the compatibility and mechanical properties of the blend system.

关 键 词：共混 聚对苯二甲酸酯 挤出 高密度聚乙烯 

分 类 号：O631.11[理学—高分子化学] TQ316.6[理学—化学]