中国塑料 ›› 2016, Vol. 30 ›› Issue (09): 26-30 .DOI: 10.19491/j.issn.1001-9278.2016.09.005

• 材料与性能 • 上一篇    下一篇

α-成核剂对PP/SEPS共混体系脆-韧转变的影响

白国强1,李本鑫1,胡跃鑫2,韩向艳1,段林海1   

  1. 1. 辽宁石油化工大学2. 辽宁石油化工大学;中国石油天然气股份有限公司抚顺石化分公司
  • 收稿日期:2016-02-26 修回日期:2016-07-18 出版日期:2016-09-26 发布日期:2016-09-26

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

  • Received:2016-02-26 Revised:2016-07-18 Online:2016-09-26 Published:2016-09-26

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。

关键词: α-成核剂, 聚丙烯, 脆-韧转变

Abstract: PP/SEPS blends containing α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.

Key words: α-nucleating agent, polypropylene, brittle-ductile transition