中华医学超声杂志

应用化学 ›› 1991, Vol. 0 ›› Issue (2): 60-64.

• 研究论文 • 上一篇    下一篇

聚丙烯/丁基橡胶共混体系的研究

郭少云, 李惠林, 徐僖   

  1. 成都科技大学高分子研究所, 成都 610065
  • 收稿日期:1990-01-18 修回日期:1990-07-31 出版日期:1991-04-10 发布日期:1991-04-10

STUDY ON IPP/IR BLENDS

Guo Shaoyun, Li Huilin, Xu Xi   

  1. Polymer KResearch Institute, Chengdu University of Science and Technology, Chendu 610065
  • Received:1990-01-18 Revised:1990-07-31 Published:1991-04-10 Online:1991-04-10

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摘要： 本文研究了丁基橡胶(IIR)对等规聚丙烯(IPP)结晶行为的影响以及IPP/IIR共混物的形态与性能的关系。IIR对IPP的熔点、结晶度、结晶温度均无明显影响,但能抑制IPP球晶的增长,少量IIR是IPP的有效成核剂。IIR用量超过30份时,共混物的抗冲击强度迅速增加,但其抗张强度随IIR用量的增加而降低。在130℃热处理2小时,IPP/IIR(100/20)的抗冲击强度提高了近4倍。

关键词: 等规聚丙烯, 丁基橡胶, 共混物, 力学性能, 结晶行为

Abstract: The effect of isobutylene-isoprene rubber(IIR) on the crystallization bebaviol of isotac-tic polypropylene(IPP) and the morphology of the blends have been studied by DSC,WAXD,polarized light microscopy,SEM and mechanical property test.IIR shows a slight influenceon the melting point, crystallinity, crystallization rate of IPP.IIR does not enter into IPPphase in melt state, but shows a retarding action on the growth of IPP crystal and is aneffective nucleating agent for IPP spherulites.The impact strength of the blend increasesrapidly with IIR content greater than 30 parts.The tensile strength of the blend, however.decreases with increase of IIR content.The impact strength of IPP/IIR(100/20) treated atabout 130℃ for 2 hours was 5 times as high as that of the untreated one.

Key words: isotactic polypropylene, butyl rubber, blend, mechanical property, crystallization behavior

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