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This work investigates the structural, thermal, and electrical properties of polymethylmethacrylate/polypyrrole (PMMA/PPy) composites. Structural analysis using X-ray diffraction reveals an increase in the crystallinity index with higher PPy concentrations. Thermogravimetric analysis (TGA) assesses thermal stability, demonstrating that increased PPy content leads to higher degradation temperatures, indicating improved thermal stability. The electrical conductivity mechanism of the composite is investigated within a frequency range from 600 to 0.2 MHz and a temperature range from 296 to 373 K using impedance spectroscopy. The frequency-dependent AC electrical conductivity is analyzed following the Jonscher’s power law, with an exponent 𝑠 greater than 1, suggesting electron hopping between adjacent sites. The temperature dependence of the AC conductivity suggested that the electrical conduction within the material is a thermally activated process.

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Investigation of Structural, Thermal and Electrical Properties of Conducting Polymer Composites: Experimental and Modeling Approaches

  • 会议论文

  • 发表日期：

    2025年

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  • N. Aribou,
  • Z. Samir,
  • R. Belhimria,
  • A. J. Paleo,
  • M. E. Achour,
  • L. C. Costa

摘要

This work investigates the structural, thermal, and electrical properties of polymethylmethacrylate/polypyrrole (PMMA/PPy) composites. Structural analysis using X-ray diffraction reveals an increase in the crystallinity index with higher PPy concentrations. Thermogravimetric analysis (TGA) assesses thermal stability, demonstrating that increased PPy content leads to higher degradation temperatures, indicating improved thermal stability. The electrical conductivity mechanism of the composite is investigated within a frequency range from 600 to 0.2 MHz and a temperature range from 296 to 373 K using impedance spectroscopy. The frequency-dependent AC electrical conductivity is analyzed following the Jonscher’s power law, with an exponent 𝑠 greater than 1, suggesting electron hopping between adjacent sites. The temperature dependence of the AC conductivity suggested that the electrical conduction within the material is a thermally activated process.