Electrical properties of conducting polymer composites: Experimental and modeling approaches

ABSTRACT

This work presents a study on the electrical conductivity of composites made up of polypyrrole particles in a polymethylmethacrylate matrix. The conductivity was studied as a function of frequency in the range 40 Hz to 100 kHz, at room temperature. McLachlan and Mamunya models were used to fit the data and compute the response in a large range of frequency. These models show satisfactory results with experimental electrical conductivities by considering the parameters of these models as adjustable parameters. Nevertheless, the exponent parameters obtained by the simulation are not universal.

KEYWORDS:

• Composites
• conducting polymer
• electrical conductivity
• mixture laws
• percolation

Acknowledgments

This work was supported by a bilateral cooperation FCT (Portugal) and CNRST (Morocco), with the project “New composite materials: application to electromagnetic shielding.” The authors acknowledge FCT-CNRST bilateral cooperation, and FEDER by funds through the COMPETE 2020 Program and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2013.