分布于聚苯乙烯基体相的纳米SiO_2粒子对聚苯乙烯/聚丙烯共混物相粗化的影响  

Effect of Nano-SiO_2 Particles in the Polystyrene Matrix on the Phase Coarsening of Polystyrene/Polypropylene Blend

作　　者：荆正军 刘西强[2] 包睿莹[2] 杨伟[2] 谢邦互[2] 杨鸣波[2] 

机构地区：[1]新乡市中科科技有限公司,河南新乡453002 [2]四川大学高分子材料科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《高分子材料科学与工程》2016年第8期81-85,92,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51422305)

摘　　要：研究了纳米SiO_2粒子选择性分布在聚苯乙烯(PS)基体相时对退火过程中聚苯乙烯/聚丙烯(PS/PP)共混物的形貌粗化行为的影响。结果表明,当纳米SiO_2粒子分散在共混物的PS基体时,可显著抑制共混物的形貌粗化过程,且抑制效果比纳米SiO_2粒子分布在共混物的分散相中时更强;纳米SiO_2粒子分散在PS基体相中时,不会抑制分散相PP分子链的运动,但分散相PP液滴回缩时需要带动PS基体发生形变,PS基体中的粒子网络会大大增加这一过程的阻力,从而抑制PP液滴的回缩;同时,基体中的纳米SiO_2粒子使PP液滴的合并过程变得非常困难。The effect of nano-SiO2 particles distributed in the polystyrene （PS） matrix on the phase coarsening of polystyrene/polypropylene （PP/PS） blend during annealing was investigated. The results indicate that the coarsening process of the blends can be significantly suppressed when nano-SiO2 particles are distributed in PS matrix, and the suppressing effect is much more prominent than the case that nano-SiO2 particles are distributed in dispersed phase. The nano-SiO2 particles in PS matrix cannot restrain the movement of the molecular chains of the dispersed PP phase, however, the particle network in the PS matrix brings in extra obstruction towards the retraction of dispersed PP droplets due to that the retraction of dispersed PP droplets needs to compel PS matrix to deform; at the same time, the nano-SiO2 particles in PS matrix make the coalescence process of dispersed PP droplets become difficult.

关 键 词：纳米粒子 聚苯乙烯/聚丙烯共混物 形貌粗化 粒子网络 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]