高分子PTC材料的一种新理论模型  

A NEW PHYSICAL MODEL FOR POLYMERIC PTC MATERIALS

作　　者：李荣群[1] 李威[1] 苗金玲[1] 王文锋[1] 姚思德[1] 彭丽[2] 张志平[2] 

机构地区：[1]中国科学院上海原子核研究所辐射化学开放实验室,上海201800 [2]华东理工大学材料科学研究所,上海200237

出　　处：《高分子材料科学与工程》2003年第5期42-45,49,共5页Polymer Materials Science & Engineering

摘　　要：首次全面、系统讨论了高分子/无机导电性复合材料所具有的各种阻-温变化行为,并在前人有关高分子PTC材料的实验和理论研究的基础上提出了一种新的物理模型——应力模型。应力理论能统一地解释不同类型高分子PTC材料在不同温度过程所表现出的复杂的阻-温特性,解决了目前理论与实验现象矛盾的问题。应力理论的提出可能为我们认识高分子PTC材料的本质和高分子PTC材料理论研究提供新的方向。Previous studies on polymeric PTC materials were emphasized on PTC effect. However, the resistivitytemperatures (RT) behaviors in polymer composites are more complicated than we used to reported, which can not be easily explained by previous theories. In this paper, a new physical model was present, which can explain the RT behaviors in polymeric PTC materials very well. It shows that this speculated model may provide a new direction for us to investigate and to approach the essence of the polymeric PTC materials.

关 键 词：高分子PTC材料 理论模型 阻-温特性 PTC效应 应力模型 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]