辐射效应对LDPE/CB复合物电性能的影响  

THE INFLUENCE OF RADIATION EFFECT ON THE ELECTRICAL RESISTIVITY OF LDPE/CB COMPOSITES

作　　者：谢鸿峰[1] 邓鹏飏[1] 孙家珍[1] 李德才[2] 

机构地区：[1]中国科学院长春应用化学研究所,长春130022 [2]北华大学化学系,吉林市132013

出　　处：《辐射研究与辐射工艺学报》2001年第4期294-298,共5页Journal of Radiation Research and Radiation Processing

摘　　要：研究了γ射线辐照交联后的低密度聚乙烯 (LDPE) /碳黑 (CB)复合物在不同温度下的导电性能。应用扫描电子显微镜研究了不同剂量对复合体系正温度系数 (PTC)效应以及负温度系数(NTC)效应的影响。结果表明 ,辐射剂量对PTC和NTC效应的影响很大。在 4 0 0kGy时 ,NTC效应基本消除 ,当辐射剂量继续增加时 ,NTC效应又重新出现。The electrical conductivity of low density polyethylene (LDPE)/carbon black (CB) irradiated by γ ray was investigated at different temperature. The relationship between the PTC and NTC effects was investigated by using scanning electron microscopy (SEM). The radiation dose was shown to have remarkable effects on the positive temperature coefficient (PTC) and negative temperature coefficient (NTC) effects of the composites. An interesting phenomenon was founded that at 400 kGy the NTC effect was nearly eliminated and when the radiation dose raise, the NTC effect reappears. The explanation of this particular behavior was discussed.

关 键 词：碳黑 导电性复合物 辐射交联 NTC效应 PTC效应 CB 低密度聚乙烯 LDPE 温度系数 

分 类 号：TB332[一般工业技术—材料科学与工程] O631.34[理学—高分子化学]