纳米碳酸钙对PP/SEBS结晶和力学性能的影响  

Effects of Nano-CaCO_3 on Crystal Properties and Mechanical Properties of PP/SEBS Composites

作　　者：王扬丹[1] 彭履瑶[1] 王莹[1] 余俊熹[1] 雷欢[1] 彭娅[1] 

机构地区：[1]西华大学材料科学与工程学院,成都610039

出　　处：《工程塑料应用》2013年第10期101-104,共4页Engineering Plastics Application

基　　金：教育部科学技术研究重点项目(210193);四川省教育厅重点项目(12ZA15);教育部"春晖计划"科研项目(Z2010093);西华大学大学生科技创新"登峰计划"项目

摘　　要：将氢化苯乙烯—丁二烯—苯乙烯(SEBS)/纳米碳酸钙(nano-CaCO3)加入聚丙烯(PP)中进行熔融共混,制备PP/SEBS/nano-CaCO3复合材料。采用扫描电子显微镜、差示扫描量热仪以及力学性能测试等研究nano-CaCO3含量对三元复合体系力学性能、微观形态结构以及结晶性能的影响。结果表明,一定量nano-CaCO3的加入不仅能改善SEBS在基体中的分散,而且可使PP的结晶温度和结晶度均下降,球晶尺寸逐渐减小;复合材料冲击强度有明显增高,而拉伸强度略有下降。当SEBS含量为10%,同时加入4%的nano-CaCO3时,复合材料可获得较好的综合力学性能。PP / SEBS / nano-CaCO3 composites were prepared by simultaneously adding styrene-ethylene / butylene：styrene triblock copolymers （SEBS） and nanometre calcium carbonates （nano-CaCO3） into polypropylene（PP） through blending. The effects of different content of nano-CaCO3 on mechanical properties, morphology and crystal properties of PP / SEBS / nano-CaCO3 composites were studied by SEM, DSC, mechanical testing etc. The results show that the addition of nano-CaCO3 can improve the dispersion of SEBS in PP matrix and make crystallization temperature, crystallinity and the size of spherulite of PP matrix decrease, which cause impact strength increase significantly while the tensile strength decline slightly. When the weight proportion of SEBS is 10% and the mass content of nano-CaCO3 is 4%, the comprehensive mechanical properties of PP/SEBS/nano-CaCO3 is optimal.

关 键 词：聚丙烯 SEBS 纳米碳酸钙 力学性能 结晶 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]