化工进展

• 材料科学与技术 • 上一篇    下一篇

PP/SEBS共混物的相形态、光学及力学性能

张德强,丁雪佳,褚文娟,袁 园,韩海军,张丽娟   

  1. 北京化工大学,北京市新型高分子材料制备与加工重点实验室
  • 出版日期:2010-07-05 发布日期:2010-07-05

Phase behavior,optical and mechanical properties of
PP/SEBS binary blend

ZHANG Deqiang,DING Xuejia,CHU Wenjuan,YUAN Yuan,HAN Haijun,ZHANG Lijuan   

  1. The Key Laboratory of Preparation and Processing of Novel Polymer of Beijing City,Beijing University of
    Chemical Technology
  • Online:2010-07-05 Published:2010-07-05

摘要: 将聚丙烯(PP)与氢化聚苯乙烯-丁二烯-聚苯乙烯嵌段共聚物(SEBS)在双螺杆挤出机中熔融共混,制备得到透明PP/SEBS共混物,并利用透光率雾度测定仪、广角X射线衍射仪、偏光显微镜、ARES流变扩展系统等进行表征。结果表明,随着SEBS含量的提高,聚丙烯的结晶性下降,共混物的透明性和低温冲击强度明显提高,而拉伸强度随之降低。流变学研究表明,随着SEBS含量的增加,PP/SEBS共混物形态由海岛结构逐渐演变为双连续相结构。

Abstract: The blends of polypropylene(PP)and styrene-ethylene/butylene-styrene elastomer(SEBS)were prepared by melt blending with a twin screw extruder. The phase behavior of the blends was investigated by means of wide angle X-ray diffraction,optical microscopy and a rheometer. Crystallizability of the blends was decreased as the increase in SEBS content,for which the haze values of injection-molded plaques decreased. The PP/SEBS blends showed a decreased tensile strength and and a increased impact strength as compared with PP. Results of rheological study showed that the blends turned to be co-continuous phase behavior as the increase in SEBS content.

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