PP/EPDM共混物断裂性能的研究  

Study on Fracture Property of PP/EPDM Blend

作　　者：李庆国[1] 谢邦互[1] 李忠明[1] 杨伟[1] 张卫勤[1] 杨鸣波[1] 

机构地区：[1]四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都610065

出　　处：《塑料工业》2006年第1期38-40,共3页China Plastics Industry

基　　金：国家自然科学基金(项目号:50373027);中石化基础研究项目(No.X504004)资助

摘　　要：采用三元乙丙橡胶(EPDM)对共聚聚丙烯(PP)增韧改性。研究了共混物的力学性能和断裂性能,着重采用基本断裂功方法探讨了材料组成对共混体系断裂性能的影响。研究发现:随EPDM用量的增加,共混物的拉伸强度逐渐下降,冲击强度均较纯PP有一定程度的提高。不同组成的PP/EPDM共混物的we均高于纯PP,we值随EPDM用量的增加呈先增大后减小的趋势,且we主要受we,n变化的影响,同样βwp的变化主要受βnwp,n变化的影响。Co-polypropylene was toughened by ethylene-propylene diene terpolymer （EPDM）, and the mechanical properties and fracture properties of the blends were investigated. The effect of the composition of the blend on the fracture property was approached specifically. It was shown that with the increase of EPDM content, the tensile strength decreased and the impact strength increased compared to pure PP. The ωe values of PP/EPDM were all higher than those of pure PP. The ωe increased with the increase of EPDM content, reached a peak value and then decreased. The evolution of ωe was mainly achieved through the variation of ωe,n and βωp was mainly subjected to the change of βnωp,n.

关 键 词：共聚聚丙烯 EPDM 共混物 基本断裂功 断裂韧性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]