预剪切注射成型iPP/MWCNTs复合材料β晶分布调控  

Controlling β Form Crystalline Distribution of iPP/MWCNTs by Pre-Shear Injection Molding

作　　者：常宝宝[1] 郑海丽[1] 郑国强[1] 刘春太[1] 申长雨[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《现代塑料加工应用》2014年第3期8-11,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(项目号51173171)资助

摘　　要：通过熔融共混制备了等规聚丙烯(iPP)/多壁碳纳米管(MWCNTs)复合材料,分析了MWCNTs对iPP基体非等温结晶行为的影响,研究了MWCNTs的加入对iPP基体β晶形成以及β晶分布的影响。结果表明:MWCNTs对iPP基体来说,可以起到α晶成核剂的作用;通过利用高温预剪切与MWCNTs之间的竞争作用,可以有效地对iPP/MWCNTs复合材料注塑制品不同层次β晶的含量及其分布进行调控。iPP/MWCNTs nanocomposites are prepared by mehing blend. The effect of MWCNTs on the nonisothermal crystallization of iPP was analyzed. The influence of MWCNTs on β form erystallinity and its distribution was investigated. The results show that MWCNTs can serve as a nucleation agent for iPP. By utilizing the competition effect between pre-shear precursors and MWCNTs, β form crystallinity and its distribution can be controlled effectively.

关 键 词：预剪切 等规聚丙烯 多壁碳纳米管 Β晶 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]