聚丙烯/炭黑复合材料的导电逾渗行为和PTC特性  

Conductive Percolation Behavior and PTC Characteristics of Polypropylene/Carbon Black Composite

作　　者：杨玲玲[1] 钟志有[1] 周金[1] 

机构地区：[1]中南民族大学电子信息工程学院,湖北武汉430074

出　　处：《塑料科技》2011年第1期54-57,共4页Plastics Science and Technology

基　　金：湖北省自然科学基金资助项目(2009CDB166)

摘　　要：以聚丙烯(PP)为基体、炭(黑CB)为填料制备复合材料,研究了不同CB种类的PP/CB复合材料的导电逾渗行为和电阻正温度系数效(应PTC)特性,同时利用扫描电镜对复合材料的微观形态进行了分析。结果表明:CB的结构性越高,比表面积越大,则其填充的复合材料逾渗阈值越低,PP/VulcanXC-72体系的逾渗阈值约为2.5%,而PP/40B2体系约为3.5%;CB的比表面积越小,结构性越低,则相同质量分数时其填充的复合体系的PTC强度越大P,P/40B2体系的PTC强度大于PP/VulcanXC-72体系。The conductive percolation behavior and positive temperature coefficient（PTC） characteristics of polypropylene（PP）/carbon black（CB） composite were investigated.The microstructure of PP/CB composite was analyzed by SEM.The results indicate that the higher the structure and specific surface area of CB are,the lower the percolation threshold of the composite will be;the percolation threshold of PP/Vulcan XC-72 composite is about 2.5%,while the percolation threshold of PP/40B2 composite is about 3.5%;when CB content is the same,the higher PTC intensity is observed in the composite which contains CB with lower structure and specific surface area;the PTC intensity of PP/40B2 composite is stronger than that of PP/Vulcan XC-72 composite.

关 键 词：聚丙烯 炭黑 逾渗 PTC特性 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]