热温改性P(MMA-St)/MWNTs复合材料导电性能研究  

Study on the conductivity of P(MMA-St)/MWNTs composites after temperature modification

作　　者：智慧[1] 徐学诚[1] 

机构地区：[1]华东师范大学物理系,上海200241

出　　处：《华东师范大学学报（自然科学版）》2013年第1期121-127,138,共8页Journal of East China Normal University(Natural Science)

基　　金：上海市纳米科技专项基金(0252nm011)

摘　　要：采用原位乳液聚合法制备了甲基丙烯酸甲酯-苯乙烯共聚物/多壁碳纳米管(P(MMA-St)/MWNTs)复合材料,并研究了热温改性对其复合材料电学性能的影响.结果表明,P(MMA-St)/MWNTs复合材料在200℃热处理1 h后,处于阈值中的复合材料电导率提高了两个数量级.用FTIR、XPS和XRD等手段探究了复合材料结构、相互作用与性能之间的关系.热处理使PMMA分子中部分酯或酸间脱去小分子形成酸酐结构,复合材料的共轭程度增大,增强了共聚物与碳纳米管之间的相互作用,提高了复合材料的电导率.Methyl methacrylate-styrene copolymer/multiwalled carbon nanotubes （P （MMA- St）/MWNTs） composites were prepared via situ emulsion polymerization and the influence of temperature modification on the conductivity of the composites was studied. The results indicated that the conductivity of the composite in the threshold value was increased by 2 orders of magni- tude after temperature modification at 200 ℃ for 1 h. The relationship between the structure, interaction and properties of the composites were initiated by FTIR, XPS and XRD. After temperature modification some ester and acid in the PMMA change into anhydride. The change can prolong the effective conjugation and enhance the interaction between copolymers and MWNTs that the conductivity of composites improved.

关 键 词：甲基丙烯酸甲酯-苯乙烯共聚物 多壁碳纳米管 热温改性 电学性能 

分 类 号：O631.23[理学—高分子化学]