β成核剂改性聚丙烯树脂的微观结构、结晶行为及力学性能研究  

Study on Microstructure,Crystallization Behavior and Mechanical Properties of Polypropylene Modified by β Nucleating Agent

作　　者：王少会[1] 章家立[1] 

机构地区：[1]华东交通大学化学化工系,江西南昌330013

出　　处：《塑料科技》2012年第1期91-94,共4页Plastics Science and Technology

基　　金：国家自然科学基金(21164001);江西省教育厅青年科学基金(GJJ11101);江西省科技支撑计划(2010ZDG02500)

摘　　要：采用熔融共混法制备了取代芳酰胺类β晶成核剂TMB-4改性聚丙烯(PP),并利用XRD、DSC、POM及SEM对改性PP的力学性能、结晶行为及微观结构进行了研究。结果表明:添加TMB-4成核剂后,PP树脂的α晶型被诱导转变为β晶型,结晶峰温度提高了16.2℃,晶粒细化;改性PP的冲击强度提高了152%,从脆性断裂转变为韧性断裂。Polypropylene（PP） modified by β crystal nucleating agent（TMB-4） was prepared by melt blending.The mechanical properties,crystallization behavior and microstructure of the modified PP were studied by means of XRD,DSC,POM and SEM.The results show that the addition of nucleating agent TMB-4 induces α crystal of PP into β crystal,increases the crystallization peak temperature by 16.2℃,and decreases the crystal particle size;compared with unmodified PP,the impact strength of modified PP increases by 152%,and the fracture mechanism shifts from brittle fracture to ductile fracture.

关 键 词：Β成核剂 聚丙烯 微观结构 结晶行为 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]