Dynamic Process of Conductive Networks Formation for Carbon Nanofiber Filled Poly(vinylidene fluoride) Composites
Using Poly(vinylidene fluoride) (PVDF) as a matrix, Vapor-grow carbon fiber (VGCF) as a conductive filler, the dynamic process of the conductive networks formation in the above composite system is investigated by real-time tracing the time dependence of electrical resistivity during the isothermal treatment. It is observed that the dynamic percolation curves for the VGCF filled PVDF composites shift to a shorter percolation time with increasing both the annealing temperature and the VGCF content. The shape of the dynamic percolation curves remains self-similarity to each other, and the Arrhenius plots of the percolation time (tp) against the inverse of the annealing temperature do not change with changing both the VGCF content and the annealing temperature. The calculated value of activation energy is about 144kJ/mol, which is not dependent on the VGCF content. Furthermore, the percolation time for VGCF filled PVDF system during the annealing treatment is predicted by a thermodynamic percolation model with modified parameters and it expresses experimental results well.
VGCF dynamic percolation conductive polymer composites
Li-qiang JIANG Lin WANG Cheng ZHANG Chun-an Ma
State Key Laboratory Breeding Base for Green Chemistry Synthesis Technology,College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou,310014
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）