机构地区: 华南农业大学理学院应用化学系
出 处: 《高分子材料科学与工程》 2007年第3期43-46,共4页
摘 要: 通过原位聚合法制备了炭黑/聚甲基丙烯酸甲酯(CB/PMMA)、炭黑/聚甲基丙烯酸丁酯(CB/PB-MA)和炭黑/聚甲基丙烯酸2-乙基己酯(CB/PEHMA)三种导电复合材料,研究了这三种聚合物基体对复合材料的导电性影响。结果表明:由于炭黑的阻聚作用,当复合材料的炭黑含量增加时,均聚物的数均分子量呈下降趋势,多分散性系数PDI变大。而且炭黑粒子表面发生了接枝聚合反应,这有利于炭黑粒子在聚合物基体中的分散。当聚合物基体的玻璃化温度Tg较高时,复合材料逾渗阈值较低。 Conductive carbon black/poly (methyl methacrylate)(CB/PMMA), carbon black/ poly(butyl methacrylate) (CB/PBMA) and carbon black/poly (2-ethylhexyl methacrylate) (CB/ PEHMA) composites were prepared by in-situ polymerization in this work. The effects of polymer matrix on electrical conductivity of the composites were studied. The experimental results indicate that the number-average molecular weight of the polymer synthesized decreases and the polydispersity index(PDI) is broadened with a rise of carbon black content due to the retardation of carbon black. The composites obtained possess a low percolation threshold when the glassy transition temperature of the polymer matrices is high
领 域: [化学工程]