论文部分内容阅读
分别以低结构炭黑(F101)和高结构导电炭黑(XE2)作为导电填料,不同牌号(E-54,E-51和E-44)的环氧树脂(EP)作为基体树脂,采用超声分散溶液混合法制备了炭黑/环氧树脂(CB/EP)复合材料。研究了CB结构、CB含量和EP基体等对复合材料正温度因数(PTC)效应的影响。结果表明:F101/EP复合材料具有明显的PTC效应,而XE2/EP复合材料的PTC效应较弱;F101/EP复合材料的PTC强度随F101含量增加而增大,这与传统热塑性基复合导电高分子材料相反;以E-54为基体的复合材料具有较高的PTC强度,而以E-44为基体的复合材料具有相对较低的PTC强度。
Epoxy resin (EP) of different grades (E-54, E-51 and E-44) was used as the matrix resin with low structure carbon black (F101) and high structure conductive carbon black Carbon black / epoxy resin (CB / EP) composites were prepared by dispersion method. The effects of CB structure, CB content and EP matrix on the positive temperature coefficient (PTC) effect of the composites were investigated. The results show that the PTC effect of F101 / EP composites is obvious, while that of XE2 / EP composites is weaker. The PTC strength of F101 / EP composites increases with the increase of F101 content. The composites with E-54 matrix have higher PTC strength, while the E-44 matrix composites with relatively lower PTC strength.