Conductive Network Formation and Electrical Properties of Poly(vinylidene fluoride)/Multiwalled Carbon Nanotube Composites: Percolation and Dynamic Percolation

被引:28
|
作者
Zhang, Cheng [1 ]
Zhu, Jun [1 ]
Ouyang, Mi [1 ]
Ma, Chunan [1 ]
Sumita, Masao [2 ]
机构
[1] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Coll Chem Engn & Mat Sci, Hangzhou 310014, Zhejiang, Peoples R China
[2] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528552, Japan
基金
中国国家自然科学基金;
关键词
multiwalled carbon nanotubes; dynamic percolation; poly(vinylidene fluoride); conductive network; electrical resistivity; POLYMER COMPOSITES; MECHANICAL-PROPERTIES; BLACK; POLYETHYLENE; TEMPERATURE; BLENDS; TIME; FUNCTIONALIZATION; AGGLOMERATION; POLYSTYRENE;
D O I
10.1002/app.30729
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Conductive network formation and its dynamic process for multiwalled carbon nanotubes (MWNTs) and carboxyl-tethered MWNT (MWNT-COOH) filled poly(vinylidene fluoride)(PVDF) systems were investigated. Based on real-time tracing the variation of electrical resistivity of systems with isothermal treatment time, the conductive network formation was evaluated. It was found that the conductive network formation was temperature and time dependent. The percolation time, characterized at a certain annealing time where the electrical resistivity started to decrease drastically, decreased with the increase of the filler concentration or the annealing temperature. However, the values of the percolation time and the activation energy of conductive network formation for the PVDF/MWNT-COOH system were higher than those of the PVDF/MWNT system, indicating that the interaction between MWNTs and PVDF molecules played an important role in the conductive network formation of the composites. Furthermore, a modified thermodynamic percolation model was proposed to predict the percolation time of PVDF/MWNT composites. It was found that the calculated results fit the experimental data very well. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 114: 1405-1411, 2009
引用
收藏
页码:1405 / 1411
页数:7
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