聚苯乙烯对β晶聚丙烯结晶及拉伸致孔行为的影响  

Influence of Polystyrene on Crystallization Behavior,Tensile Properties and Cavitation Behavior of β-nucleated Isotactic Polypropylene

作　　者：韦丽明 亢健[2] 

机构地区：[1]上海子源经贸有限公司(江苏精良高分子材料有限公司),上海200333 [2]四川大学高分子研究所,高分子材料工程国家重点实验室,四川成都610065

出　　处：《中国塑料》2015年第9期73-77,共5页China Plastics

摘　　要：采用差示扫描量热仪、X射线衍射仪、万能力学测试仪、扫描电子显微镜研究了聚苯乙烯(PS)对β晶聚丙烯(β-PP)的结晶行为、聚集态结构、拉伸行为及成孑性能的影响。结果表明,当PS加入量从零提升至10%时可促使β-PP的β晶含量从85.9%逐步提升至93.4%;PS在β-PP中有较好的分散效果,以微米级颗粒形式较为均匀地分散在β-PP中;PS加入后,经双向拉伸所得的微孔膜的成孔性能明显改善,孔径尺寸明显变小,孔径尺寸分布更加均匀。In this study, the influence of polystyrene （PS） on the crystallization behavior, morphology, tensile properties, and cavitation behavior of 0-nucleated isotactic polypropylene （β- PP） was investigated by means of differential scanning calorimetric （DSC）, 2D-wide angle X-ray diffraction （2D-WAXD）, universe mechanical testing machine, and scanning electronic microscope （SEM）. It was found that as the amount of PS increased from 0 to 10 %, the content of β-phase increased＂ gradually from 85.9 to 93.4 %. PS exhibited a good dispersion effect with β-PP, which dispersed uniformly within the β-PP matrix in micro-meter sized small sphere. High temperature tensile test revealed that with the addition of PS, the neck width and hardening modulus decreased, indicating that the tensile stress could be better dispersed in the sample. Moreover, the microporous membrane was prepared by two-direction stretching, and the result of SEM observation showed that with the addition of PS, the pore size decreased and the pore size distribution became narrower.

关 键 词：β晶聚丙烯 聚苯乙烯 成核剂 微孔膜 

分 类 号：TQ317[化学工程—高聚物工业]