聚丙烯／无机纳米粒子复合材料的发泡行为  

The Foaming Behavior of Polypropylene/Inorganic Nanoparticles Composites

作　　者：何跃[1,2] 郝明洋[1,2] 张纯[2] 蒋团辉[2] 何力[1,2] 龚维[1,3,2] 

机构地区：[1]贵州大学材料与冶金学院,贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014 [3]贵州师范大学材料与建筑工程学院,贵阳550014

出　　处：《高分子通报》2016年第4期80-87,共8页Polymer Bulletin

基　　金：国家自然科学基金项目(课题编号21264004);贵州省科技厅重大专项(编号2012-6023);贵州省科技创新人才团队建设(编号[2014]4006);黔科合人字(2015)29号

摘　　要：利用型腔体积可控注塑发泡装备制备聚丙烯/无机纳米粒子微发泡复合材料,通过复合材料的流变行为和结晶行为,分析了无机纳米粒子对聚丙烯发泡行为的影响。结果表明:无机纳米粒子有促进气泡异相成核作用,同时无机纳米粒子引入可以提高聚丙烯黏弹响应和降温结晶起始温度,起到了抑制泡孔结构恶化的作用,显著改善了聚丙烯的泡孔结构;在聚丙烯材料中添加纳米CaCO3、纳米OMMT、纳米SiO2进行发泡,以PP/OMMT发泡材料的发泡质量最理想,其泡孔密度和尺寸分别为2×106个/cm3和24.2μm。The Foamed Polypropylene （PP） and polypropylene/inorganic nanoparticles composites samples were prepared with different kinds of inorganic nanoparticles in the same volume expansion ratio using a injection molding machine equipped with volume-adjustable cavity, and the foaming behavior was investigated. It was found that cell structure of pure Polypropylene was deteriorated, however the introduction of inorganic nanoparticles improved the rheological property and crystallization onset temperature of polymer melt, and the ceil structure deterioration was suppressed, and the foaming behavior of Poiypropylene composites was excellently improved. The results show that the PP/OMMT foamed composite had the best cell morphological structure. The cell diameter and density were 24.6urn and 2×106 cell/cm3 respectively.

关 键 词：聚丙烯 无机纳米粒子 流变行为 结晶行为 发泡行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]