α-成核剂对PP/SEPS共混体系脆-韧转变的影响  

Effect of α-Nucleating Agent on Brittle-ductile Transition of PP/SEPS Blends

作　　者：白国强[1] 李本鑫[1] 胡跃鑫[1] 韩向艳[1] 段林海[1] 

机构地区：[1]辽宁石油化工大学化学与材料科学学院,辽宁抚顺113001

出　　处：《中国塑料》2016年第9期26-30,共5页China Plastics

摘　　要：采用熔融共混法制备了具有不同α-成核剂(α-NA)含量的聚丙烯(PP)和氢化苯乙烯-异戊二烯-苯乙烯嵌段共聚物(SEPS)共混体系,通过扫描电子显微镜观察了不同共混体系分散相的粒子尺寸及分布,根据逾渗模型计算了不同共混体系的粒子间距,定量描述了α-NA含量对共混体系临界粒子间距的影响。结果表明,α-NA的含量越高,共混体系的临界粒子间距越大,越有利于脆-韧转变的发生。PP/SEPS blends containing a-nucleating agent （α-NA） were prepared by melt mixing process. And the particle size and distribution of dispersed phase were measured by scanning electron microscopy. The inter-particle distance in the blendS with different content of α-NA was calculated according to a percolation model, and the effect of content of α-NA on the critical inter- particle distance was described quantitatively. It was found that the higher the content of α-NA, the greater the inter-particle distance, and the easier the brittle-ductile transition.

关 键 词：α-成核剂 聚丙烯 脆-韧转变 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]