β成核剂对聚丙烯结晶及力学和耐磨性能的影响研究  

Influence of β-nucleating Agent on Mechanical,Wear and Crystallite Property of PP

作　　者：庞键[1] 周正发[1] 任风梅[1] 徐卫兵[1] 

机构地区：[1]合肥工业大学高分子科学与工程系

出　　处：《合肥学院学报（自然科学版）》2008年第1期42-44,共3页Journal of Hefei University :Natural Sciences

摘　　要：先将β成核剂TMB-5制成母粒,再用于改性聚丙烯(PP).研究结果表明TMB-5的加入对聚丙烯的拉伸强度影响小,但聚丙烯的简支梁缺口冲击强度和断裂伸长率均有较大幅度提高,TMB-5用量为0.1%时,聚丙烯的简支梁缺口冲击强度达到17.6kJ/m2.TMB-5的加入可以提高聚丙烯的耐磨性能,TMB-5用量为0.3%时,聚丙烯的耐磨性能最佳.差示扫描量热(DSC)、广角X衍射(XRD)的研究表明:TMB-5对聚丙烯的结晶不仅具有明显的成核作用,而且部分改变了聚丙烯的晶型.In this paper, β-nucleating agent TMB-5 is applied to modify polypropylene （PP）. The experiment results reveal that the tensile strength of PP change indistinctively when TMB-5 is added, whereas the notched charpy impact strength and elongation at break of PP increased considerably. The notched charpy impact strength of PP reaches 17.6 kJ/m^2 when the amount of TMB-5 is 0.1%. The addition of TMB-5 can improve the wear property of PP, which is the best when the amount of TMB-5 is 0.3%. The analysis of differential scanning calorimeter （DSC） and X-ray diffractometer （XRD） reveals that TMB-5 not only acts as a nuclearting agent but also changes the crystallite type during the crystallization of PP.

关 键 词：聚丙烯 Β晶型成核剂 结晶 力学性能 耐磨性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]