炭黑填充LDPE/EVA体系发泡复合材料的电阻-温度特性  

Electrical Properties of CB Filled LDPE/EVA Conductive Foam Composite

作　　者：司春雷[1] 李继新[1] 李素君[1] 陈延明[1] 吴全才[1] 

机构地区：[1]沈阳工业大学辽阳校区石油化工学院,辽宁辽阳111003

出　　处：《塑料》2008年第1期51-55,共5页Plastics

摘　　要：以低密度聚乙烯(LDPE)和乙烯-乙酸乙烯酯(EVA)为主基体,乙炔炭黑(ACET)为导电填料,偶氮二甲酰胺(AC)为发泡剂,过氧化二异丙苯(DCP)为交联剂制备了LDPE/EVA/CB导电泡沫复合材料。研究了此复合材料的泡孔结构、渗流阀值、阻温特性。并分析了不同炭黑填充量、不同LDPE/EVA配比、相同基体配比发泡与否对复合材料阻温性能的影响。制备的导电泡沫具有比较理想的泡孔结构,经过升温电阻测试,发现LDPE/EVA/ACET导电发泡复合材料具有良好的开关特性,呈现明显的PTC特性。确定了LDPE/EVA的合理配比及ACET、AC、DCP的适宜用量,从而获得了既具有优良的泡沫性能,又有良好PTC特性的导电泡沫材料。LDPE/EVA/CB conductive foam was made with LDPE and EVA as matrix, CB（ACET） as conductive filler, AC as foamer and DCP as crosslinker. The bubble structure and resistivity-temperature characteristic were observed. Influences of LDPE/EVA proportion, carbon black content, crosslinker,foamer on conductive properties of LDPE/EVA/CB foaming conductive composites were investigated. The obtained foam had rather good bubble structure and switching characteristic： CB （ACET） filled LDPE/EVA system performned PTC effect during heating process. The proper proportion of LDPE/EVA, filler content of the crosslinker and foamer were confirmed to make the composite have not only good foam performance hut also PTC characteristic.

关 键 词：LDPE CB 泡沫 PTC 导电复合材料 

分 类 号：TQ328[化学工程—合成树脂塑料工业] TQ327.8