聚氯乙烯的热激活断裂  

THERMAL ACTIVATION FRACTURE OF PVC

作　　者：柳永宁[1,2,3] 冯强[1,2,3] 宋小龙[1,2,3] 吴锐镛 

机构地区：[1]西安交通大学材料学院 [2]郑州纺织工学院机电系 [3]西北建筑工程学院机电系

出　　处：《高分子材料科学与工程》1998年第2期90-93,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金;西安交通大学青年基金

摘　　要：展示了聚氯乙烯（ＰＶＣ）在不同温度下由试验速率增加而引起的韧脆性转化。随加载速率升高，材料断裂吸收的能量不断降低，低速范围加载的断裂方式以塑性机制为主，而高速加载导致材料脆化。通过热激活分析，获得了该转化过程的定量化关系。该关系初步描述了由于速率和温度引起的韧脆性转化过程。The paper disclosed first a ductile to brittle fracture transition of PVC caused by increasing loading rate at several constant temperatures. As the increase of loading rate, the fracture energy decreases continuously. The fracture mechanism is in plastic way when loading rate is low while the brittleness has been developed when loading rate is high. A quantitative relationship has been obtained through thermal activation analysis, which can discribe fully the transition caused by loading rate or by temperature.

关 键 词：高分子材料 热激活 断裂 聚氯乙烯 

分 类 号：O632.21[理学—高分子化学] O631.21[理学—化学]