自增强HDPE的断裂行为分析和力学性能预测  

Analysis of Fracture Behavior and Prediction of Mechanical Properties of Self-reinforced HDPE

作　　者：王惠民[1] 益小苏[1] 

机构地区：[1]浙江大学高分子系,杭州310027

出　　处：《合成树脂及塑料》1995年第2期39-43,共5页China Synthetic Resin and Plastics

基　　金：国家自然科学基金;"八六三"资助项目

摘　　要：研究发现自增强HDPE的断裂行为不同于普通的HDPE、它的断裂强度、σ_u小于屈服强度σ_s,表现出脆性破坏特征,采用断裂分子理论分析了自增强HDPE抗破断能力提高的内在原因,认为HDPE自增强后,断裂活化能的改变和活化体积的减小、从而抑制了原子键的热激活,是提高抗破断能力的主要原因之一。据自增强HDPE的结构特征,提出了自增强高分子材料的力学性能估算方法。The fracture behaviors of self-reinforced HDPE(SR HDPE)were different from those of the normal HDPE SR-HDPF, showed a britlle failure feature owing to its failure strength ( σu) being below its yield strength (σs). By analyses based on eyring ' s theory , the changes of the fracture activation energy and the activation volume of SR-HDPE gave rise to the increase of its failure resistance . were compared with that of the normol HDPE. The tensile strength and modulus of SR-HDPE . compared with those of normal HDPE . were enhanced appreciably . The Shish-Kebal and the fibrous structwre in SR-HDPE were credited for its excellent properties . Based on the microstructure features . the model and method of predicting the mechanical properties of SR-HDPE were presented . The predictions are in good agreement with evpenniental values.

关 键 词：自增强 高密度聚乙烯 断裂行为分析 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]