微孔发泡PP材料的断口形貌分析  

Appearance of Fracture Analysis of Microcellular Foam Material

作　　者：周丽[1] 何颖[1] 何力[1] 罗筑[1] 宋治福[1] 龚维[1] 张纯[1] 

机构地区：[1]贵州大学材料物理研究所

出　　处：《现代机械》2006年第3期69-69,99,共2页Modern Machinery

基　　金：国家863计划西部新材料行动资助项目(编号2003AA33X080)。

摘　　要：本文采用二次开模注射成型的方法制取PP微孔发泡材料,对其力学性能进行了测试,实验结果表明,除拉伸强度有所下降外,其它机械性能都得到了提高,尤其冲击强度得到显著提高。用扫描电子显微镜观察了PP微孔发泡材料试样的冲击断口,初步研究了其断口形貌,认为冲击强度提高的原因主要是裂纹扩展过程中微孔吸收了大量的能量和转移了裂纹扩展路径。In this paper , the microcellular foam materials of plastics were made by second-open molding. The mechanical properties of notched impact strength and so on were tested and microstructure of the part of fracture of microcellular foam materials were studied by SEM. Meanwhile,the reasons that the notched impact strength was increased were analyzed.

关 键 词：断口形貌分析 扫描电镜 冲击强度 

分 类 号：TQ328.9[化学工程—合成树脂塑料工业] TQ328