β成核剂对iPP薄膜微观结构和力学性能影响  

Effect of β Nucleating Agent on the Microstructure and Mechanical Properties of iPP Films

作　　者：刘忠柱[1] 郑海丽[1] 郑国强[1] 刘春太[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《现代塑料加工应用》2013年第5期35-37,共3页Modern Plastics Processing and Applications

摘　　要：通过挤出-拉伸法制备了等规聚丙烯(iPP)/稀土类β成核剂复合薄膜。研究了不同含量β成核剂对薄膜力学性能的影响,并用二维广角X射线衍射法(2D-WAXD)、二维小角X射线散射法(2D-SAXS)和拉伸试验对其微观结构和力学性能进行了表征。结果表明:β成核剂对薄膜的微观结构变化有很大影响。薄膜的拉伸强度和断裂伸长率随着β成核剂含量的增加先增大后减小,当β成核剂质量分数为0.20%时,达到最大值。Isotactic polypropylene （iPP）/rare earth β nucleating agent composite films were prepared by extrusion-stretching method. The effect of rare earth β nuclea- ting agent content on mechanical properties of the obtained films was studied. The mi- crostructure and mechanical properties of the films were characterized by 2D-WAXD, 2D-SAXS and tensile test. The results show that the content of β nucleating agent plays a crucial role in the microstructure development of the films. The tensile strength and elongation at break of iPP films firstly increase and then decrease with the increasing of β nucleating agent content and reach a maximum when the mass ratio of β nucleating agent is 0. 20%.

关 键 词：等规聚丙烯 薄膜 Β成核剂 微观结构 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]