成核剂对iPP晶体形态、结晶度与力学性能的影响  

Study on the Effect of β Nucleating Agent on the Mechanical Properties of Polypropylene

作　　者：王苓[1] 王正有[1] 何晓利[1] 王丽莎[1] 李维[1] 杨翰博[1] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039

出　　处：《西华大学学报（自然科学版）》2012年第6期4-8,共5页Journal of Xihua University:Natural Science Edition

基　　金：四川省教育厅科研重点项目(07ZA106)

摘　　要：利用偏光显微镜(PLM)和广角X射线衍射法(XRD)对β成核聚丙烯的结晶行为的表征,以及拉伸性能和冲击性能测试研究的结果表明:β成核剂的加入使聚丙烯中有β晶型出现,随着成核剂加入量的增加,β成核改性iPP的结晶度和晶体尺寸分别增大和减小,β成核剂为0.1%时成核改性iPP的冲击强度达到最佳,β成核剂加入量高于0.1%时,成核改性iPP的冲击强度呈降低趋势,拉伸强度、断裂强度和刚度则呈增大趋势。Crystallization of β nucleated polypropylene was characterized by using the polarized optical microscopy （ PLM ） and wide - angle X - ray diffraction （XRD） and the research results of the tensile and impact properties indicate that β nucleating agent significantly introduced β - PP crystal and with the increase in β nucleating agent β - PP crystallinity of β nucleated PP increased, so that its impact strength achieved the highest value when there was 0.1% of β nucleating agent in iPP. While the content of β nucleating agent was over 0. 1% the impact strength as well as the tensile and fracture strength and Young＇s modulus of iPP appeared decrease and increase respectively.

关 键 词：均聚聚丙烯 Β成核剂 Β晶 结晶度 冲击强度 

分 类 号：TQ[化学工程]