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首页> 外文期刊>Journal of Applied Polymer Science >The role of conductive pathways in the conductivity and rheological behavior of poly(methyl methacrylate)-graphite composites
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The role of conductive pathways in the conductivity and rheological behavior of poly(methyl methacrylate)-graphite composites

机译：导电通路在聚甲基丙烯酸甲酯-石墨复合材料电导率和流变行为中的作用

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Up to now, research on the dynamic process of conductive network formation has tended to focus on composite particles with one-dimensional geometry, such as carbon black and carbon nanotubes. However, studies on this subject based on fillers with two-dimensional structure, such as graphite, are rare in the literature. In this work, the dynamic percolation and rheological properties of poly(methyl methacrylate) (PMMA)-graphite composites under an electric field were investigated. The activation energies of conductive network formation and polymer matrix mobility were calculated from the temperature dependence of the percolation time and the zero-shear viscosity. It was found that the activation energy calculated from the zero-shear viscosity was not influenced by the electric field in the concentration range investigated, but the electric field had an effect on the activation energy calculated from the percolation time. This finding emphasizes that the electrical and rheological properties have different physical origins. (C) 2016 Wiley Periodicals, Inc.
机译：到目前为止，对导电网络形成动态过程的研究一直集中在具有一维几何形状的复合颗粒上，例如炭黑和碳纳米管。然而，在文献中很少进行基于具有二维结构的填料例如石墨的关于该主题的研究。在这项工作中，研究了在电场作用下聚（甲基丙烯酸甲酯）（PMMA）-石墨复合材料的动态渗透和流变性能。导电网络形成的活化能和聚合物基体迁移率是根据渗透时间和零剪切粘度的温度依赖性计算的。发现由零剪切粘度计算出的活化能不受所研究浓度范围内的电场的影响，但是电场对由渗滤时间计算出的活化能有影响。该发现强调，电学和流变学性质具有不同的物理起源。 （C）2016威利期刊公司

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