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This workElectrical conductivity presentsComposite material the electrical and dielectricDielectrics properties of poly (methyl methacrylate) (PMMA) composites filled with conductive polypyrrole (PPy) particles in the frequency range from 600 Hz to 1 MHz, and in a temperature range from 290 to 380 K. Investigation of AC conductivity indicated a thermally activated conduction mechanism, explained by a correlated barrier hopping (CBH) model. Notable, the decrease in activation energy with increasing frequency observed was also discussed from the CBH model. The temperature dependence of the electrical and dielectricDielectrics response has been analyzed for concentrations above the percolation threshold. The dielectricDielectrics permittivity was analyzed using the Havriliak-Negami modelHavriliak-Negami model taking into account the effect of electrode polarizationDielectric polarization. This analysis enabled us to describe quantitatively the experimental data, calculate the ohmic conductivity, and determine the parameters characterizing the contribution of ohmic conduction to the complex dielectricDielectrics permittivity.

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Dielectric Behavior and AC Electrical Conductivity of Composite Materials Based on Conducting Polymers

  • 会议论文

  • 发表日期：

    2025年

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  • S. Barnoss,
  • N. Aribou,
  • A. J. Paleo,
  • Mohammed Essaid Achour,
  • L. C. Costa

摘要

This workElectrical conductivity presentsComposite material the electrical and dielectricDielectrics properties of poly (methyl methacrylate) (PMMA) composites filled with conductive polypyrrole (PPy) particles in the frequency range from 600 Hz to 1 MHz, and in a temperature range from 290 to 380 K. Investigation of AC conductivity indicated a thermally activated conduction mechanism, explained by a correlated barrier hopping (CBH) model. Notable, the decrease in activation energy with increasing frequency observed was also discussed from the CBH model. The temperature dependence of the electrical and dielectricDielectrics response has been analyzed for concentrations above the percolation threshold. The dielectricDielectrics permittivity was analyzed using the Havriliak-Negami modelHavriliak-Negami model taking into account the effect of electrode polarizationDielectric polarization. This analysis enabled us to describe quantitatively the experimental data, calculate the ohmic conductivity, and determine the parameters characterizing the contribution of ohmic conduction to the complex dielectricDielectrics permittivity.