华东师范大学学报(自然科学版) ›› 2013, Vol. 2013 ›› Issue (1): 121-127, 138.

• 应用物理 • 上一篇    下一篇

热温改性P(MMA-St)/MWNTs复合材料导电性能研究

智 慧， 徐学诚   

  1. 华东师范大学 物理系， 上海 200241
  • 收稿日期:2012-03-01 修回日期:2012-06-01 出版日期:2013-01-25 发布日期:2013-01-18

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

ZHI Hui, XU Xue-cheng   

  1. Department of Physics, East China Normal University, Shanghai 200241, China
  • Received:2012-03-01 Revised:2012-06-01 Online:2013-01-25 Published:2013-01-18

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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.

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

Abstract: 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 magnitude 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.

Key words: P(MMA-St), MWNTs, temperature modification, conductivity

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