微型注塑条件下β-iPP／POE的结构和性能  

Morphology and Properties of Micro-Injection Molded β-iPP/POE

作　　者：靳明[1] 刘洪[1] 许祥[1] 张杰[1] 

机构地区：[1]高分子材料工程国家重点实验室,四川大学高分子科学与工程学院,四川成都610065

出　　处：《现代塑料加工应用》2015年第3期19-21,共3页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(项目号:51433006)资助

摘　　要：研究了在微型注塑条件下乙烯辛烯共聚弹性体(POE)和β成核剂对等规聚丙烯(iPP)结构和性能的影响,采用偏光显微镜(PLM)、扫描电子显微镜(SEM)、示差扫描量热仪(DSC)和二维广角X射线衍射(WAXD)对制件的结晶和取向形态进行了研究。结果表明,POE弹性体和β成核剂的加入提高了微型注塑件的起始结晶温度和取向结构的热稳定性,并且POE诱导了完善的β柱晶对称生长在长纤维晶的表面。The effect of POE and β-nucleating agent on the morphlogy and properties of iPP was mainly studied. PLM, SEM, DSC and WAXD were adopted to study the crystalline and oriented morphologies of the microparts. The results show that addition of POE and B-nucleation agent increases onset crystallization temperatures of the micro-injection molding specimens as well as the thermal stability of oriented structures. Furthermore, POE induces the formation of perfect β-cylindrulites that are epiphytic and symmetrical on the surface of long fibrous crystals.

关 键 词：等规聚丙烯 形态 结晶 取向 Β成核剂 微型注塑 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]