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.
出处
《现代塑料加工应用》
CAS
北大核心
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)
关键词
微孔发泡
聚丙烯
二氧化硅成核作用
熔体黏度
microcellular foam
polypropylene
silicon dioxide
nucleation
melt viscosity
