SiO_2对聚丙烯/SiO_2复合材料微孔发泡作用  

Effect of Ultra-Fine SiO_2 on PP/SiO_2 Microcellular Foaming Composites

作　　者：武毅[1,2] 何力[2] 高俊强[2] 贾仕奎[1,2] 朱艳[1,2] 柯昌月[1,2] 朱建华[2] 

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

出　　处：《现代塑料加工应用》2011年第6期21-24,共4页Modern Plastics Processing and Applications

基　　金：国家重点基础研究发展计划(973)资助(2007CB616912)

摘　　要：通过熔融共混法把改性过的超细SiO_2加入到聚丙烯(PP)中,制备PP/SiO_2复合材料母粒,通过化学发泡注塑工艺制备PP/SiO_2微发泡复合材料。用扫描电镜观察了发泡样品的泡孔结构,借助电子探针和转矩流变仪研究了超细SiO_2粒子在PP复合材料微孔发泡中的作用。结果表明,SiO_2粒子之所以能够改善PP微孔发泡材料的微孔结构。一方面是SiO_2粒子的成核作用,另一方面是SiO_2的加入提高了PP熔体黏度。The ultra-fine SiO2 was modified,then PP/SiO2 composites were prepared by melt blending. PP/SiO2 microcellular foaming composites were prepared through the injection molding by the chemical method. The cell structures of foams were characterized by SEM. The effect of ultra-fine SiO2 in PP/SiO2 microcellular foaming composites was investigated by means of electron probe and torque rheometer. The results show that the ultra-fine SiO2 can improve the cell structures of PP/SiO2 microcellular foaming composites. On the one hand, the ultra-fine SiO2 can increase the nucleation,on the other hand,the ultra-fine SiO2 can improve the melt viscosity properties of PP.

关 键 词：微孔发泡 聚丙烯 二氧化硅成核作用 熔体黏度 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]