Poly(ethyleneterephthalate)/multi-walled carbon nanotube/carbon black (PET/MWNT/CB) nanocomposites were prepared by in-situ polymerization method.The effects of MWNT and CB on the conductivity, crystallization properties and thermal stability were studied.Furthermore, their cooperative conductive effects in PET were investigated as well.The results showed that the surface resistanceof PET/MWNT/CB nanocomposites was 1011Ω when the contents of MWNT and CB were 0.5wt% of PET.MWNT and CB can form cosupporting conductive networks and composite conductive paths in PET.As a result, a cooperative conductive effect can be obtained.Also, they possess inductive effects of nucleation and crystallization on PET.However, the inductive ability of CB was worse than that of MWNT.The addition of CB has little effect on the thermal stability of PET/MWNT/CB nanocomposites.%采用原位聚合方法制备了聚对苯二甲酸乙二醇酯/多壁碳纳米管/炭黑(PET/MWNT/CB)纳米复合材料,研究了MWNT与CB对复合材料导电性能、结晶性能和热稳定性的影响,考察了二者的协同导电效应.结果表明,当MWNT与CB复合填料含量为0.5%(质量分数)时,复合材料的表面电阻为1011 Ω.CB与MWNT在PET中能形成"共支撑"网络结构和复合导电通路,具有协同导电效应.二者对PET具有诱导成核与结晶作用,但CB的诱导能力要弱于MWNT.CB的添加对复合材料的热稳定性影响不大.
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