Structural analysis and dielectric relaxation mechanism of conducting polymer/volcanic basalt rock composites

Abstract

In this work, polypyrrole and polythiophene conducting polymers (CPs) have been synthesized and doped with volcanic basalt rock (VBR) in order to improve their dielectric properties for technological applications. The structure and morphology of the composites with different VBR doping concentrations were characterized by FT-IR and SEM analyses. The best charge storage ability was achieved for maximum VBR doping concentration (50.0 wt.%) for both CPs. Dielectric relaxation types of the composites were determined as non-Debye type due to non-zero absorption coefficient and observation of semicircles whose centers were below Z axis at the Nyquist plots. It was also ascertained that VBR doping makes the molecular orientation easier than for non-doped samples and reduced energy requirement of molecular orientation. In addition, AC conductivity was totally masked by DC conductivity for all samples at low frequency.

Machine learning models for estimating the AC conductivity mechanism of Edirne Kufeki stone reinforced Polypyrrole composites

“…In the present study, conductivity properties of the polymer-based natural mineral reinforced composites have been evaluated since polymer composites which are prepared by using natural additives and waste materials have remarkable electrical properties such as high dielectric constant, low dielectric loss, and enhanced electrical conductivity. [38][39][40] The data obtained by Reference 41 for pure PPy, PPy/5% EKS, PPy/10% EKS, and PPy/20% EKS composites in the frequency range of 1 Hz to 40 MHz at 296 K-323 K temperature has been used as experimental data set for ML. The ac conductivity versus angular frequency curves in the logarithmic scale at the related temperatures for pure PPy, PPy/5% EKS, PPy/10% EKS, and PPy/20% EKS composites in Figure 2.…”