相对分子质量对PVC/ABS合金结构及性能影响的研究  

Study on Structure and Properties of Different Relative Molecular Mass PVC/ABS Alloy

作　　者：于杰[1,2] 贺杰[1,2] 郭建兵[1] 罗筑[1,2] 秦舒浩[1] 

机构地区：[1]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [2]贵州大学材料科学与冶金工程学院,贵州贵阳550003

出　　处：《中国塑料》2009年第4期24-28,共5页China Plastics

基　　金：黔科合重大专项字(2006-6033);国家科技支撑计划(2007BAB08B05)

摘　　要：采用锥形双螺杆挤出机制备了不同相对分子质量的聚氯乙烯/丙烯腈-丁二烯-苯乙烯共聚物(PVC/ABS)合金,采用转矩流变仪、扫描电子显微镜研究了PVC相对分子质量对PVC/ABS合金流变行为、相形态及力学性能的影响。结果表明:PVC/ABS合金呈现典型的"海-岛"结构,两者有较好的相容性,随着PVC相对分子质量的增加,ABS相区平均尺寸略有增加且尺寸分布变宽;PVC相对分子质量增大使得PVC/ABS共混物的平衡扭矩明显增大,表观黏度增加;随着ABS含量的增加,不同PVC相对分子质量的PVC/ABS合金的韧性均得到了大幅的提高,当ABS含量增加到10份以上时,不同PVC相对分子质量的PVC/ABS合金均达到超韧,PVC相对分子质量增大使得PVC/ABS合金的增韧效果更显著。Poly （vinyl chloride）/acrylonitrile-butadiene-styrene copolymer blends （PVC/ABS） were prepared with a conical twin-screw extruder, whose rheological behavior, microstructure, and mechanical properties were studied. It showed that ABS dispersed finely in the PVC giving seaisland morphology. With increasing molecular mass of PVC, the particle size of ABS became slightly larger and wider distributed, owing to the increased viscosity. As the content of ABS increased, the toughness of the blends increased substantially. When the molecular mass of PVC was high, such toughening became more effective.

关 键 词：聚氯乙烯 丙烯腈-丁二烯-苯乙烯共聚物 相对分子质量 相形态 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]