聚氯乙烯／α-甲基苯乙烯-丙烯腈共混体系的相容性和性能研究  

Studies on the Miscibility and Properties of PVC/α-MSAN Blends

作　　者：熊雷[1] 邓志伟[1] 陈光顺[1] 郭少云[1] 

机构地区：[1]高分子材料与工程国家重点实验室 四川大学高分子研究所,成都610065

出　　处：《高分子通报》2009年第6期54-58,共5页Polymer Bulletin

基　　金：国家高技术研究发展项目计划(863计划)(2006AA03Z542);国家科技支撑计划(2007BAE10B02);

摘　　要：选用腈基含量为30%的α-甲基苯乙烯-丙烯腈(-αMSAN)作为聚氯乙烯(PVC)的耐热改性剂,通过熔融共混制备了PVC/-αMSAN共混材料。通过SEM、DSC、DMA及透光率测试等手段系统研究了-αMSAN的含量对PVC/-αMSAN共混体系相容性的影响,发现在高达60%(wt)的-αMSAN的含量范围内它们具有良好的相容性,并从分子结构上解释了其相容性良好的原因;随-αMSAN含量增加,共混体系的维卡软化温度(VST)和拉伸强度上升,冲击强度下降;-αMSAN的引入会导致共混体系及PVC静态热稳定时间下降,共混体系的颜色加深。同时分析了-αMSAN对共混体系耐热性能、热稳定性能和力学性能产生影响的机理。In this paper, a kind of a-Methyl-styrene-acrylonitrile （α-MSAN） with 30% acrylonitrile （AN） content was used as a heat resistant modifier to prepare PVC/α-MSAN blends. The miscibility of PVC/α-MSAN blends was investigated by SEM, DSC, DMA and transmittance tests. It was found that α-MSAN is miscible with PVC even at 60% （wt） content of α-MSAN in these blends. The molecular structure of α-MSAN and the additional intermolecular interaction between α-hydrogen of PVC and AN of α-MSAN have accounted for the miscibility improvement of this blend system. For PVC/α-MSAN blends, with an increase of α-MSAN content, the VST and tensile strength increase, the impact strength and thermal stability decrease. The mechanism of the effects of α-MSAN on the mechanical and thermal stable properties is proposed.

关 键 词：聚氯乙烯 α-甲基苯乙烯-丙烯腈 相容性 维卡软化温度 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]