滑石粉、碳酸钙填充聚丙烯复合材料非等温结晶行为的对比研究  

Non-isothermal Crystallization Behavior of Polypropylene Filled by Talc or Calcium Carbonate

作　　者：邹燕[1] 纪彬彬[1] 温变英[1] 

机构地区：[1]北京工商大学材料科学与工程系,北京100048

出　　处：《中国塑料》2009年第11期26-29,共4页China Plastics

基　　金：北京市教委科技发展计划项目资助(KM200710011002)

摘　　要：运用熔融共混法分别制备了聚丙烯（PP）／滑石粉、PP／碳酸钙复合材料，借助于差示扫描量热仪和热台偏光显微镜等研究了复合材料的非等温结晶形态及其结品行为，同时对其增强增韧效果进行了考查。结果表明，滑石粉有明显的异相成核作用，使PP球晶的尺寸变小，其结晶温度和熔融温度分别升高了约3～5℃和1℃，结晶度提高了约3％；而碳酸钙却未表现出成核作用，加入后反而使PP得到大而完善的球晶，其熔融温度及结晶度变化不大，却使结晶温度降低了约2～4℃。填加低含量的滑石粉和碳酸钙均能提高基体PP的力学性能，且滑石粉的增强增韧效果优于碳酸钙。PP/talc and PP/CaCO3 composites were prepared via melt mixing, whose crystallization behavior was studied using differential scanning calorimetry and hot stage polarized light microscopy. It was found that talc caused heterogeneous nucleation of PP, resulting in reduced size of spherulites, higher crystallization and melting temperatures. In contrast, no heterogeneous nucleation was observed on calcium carbonate, large and perfect spherulites were formed, crystallization and melting temperatures were not affected. Both talc and CaCO3 showed good reinforcing and toughening effects on PP matrix, with talc being better than CaCO3.

关 键 词：聚丙烯 碳酸钙 滑石粉 非等温结晶行为 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]