Spectroscopic Analysis of the Dielectric Properties in Reduced Graphene Oxide Loaded Epoxy Polymer Composites

In this paper we present an analysis of the dielectric propertiesDielectric Properties of reduced graphene oxideReduced Graphene Oxide (rGO) particles loaded with epoxyEpoxy polymer, Diglycidyl Ether of Bisphenol A (DGEBA) using impedance spectroscopyImpedance Spectroscopy in the frequency range 102–106 Hz and over the temperature range of 300–400 K. For this investigation, a series of eight samples were prepared with various filler contents below and above the percolation thresholdPercolation Threshold $$\phi_{c} = 4\%$$ . The rGOReduced Graphene Oxide concentration-dependent complex permittivityComplex Permittivity is analyzed based on the universal power law, and the dielectric propertiesDielectric Properties and their frequency dependency for all samples are evaluated. The critical exponents describing the concentration dependence of the dielectric constant, obtained in the vicinity of the percolation thresholdPercolation Threshold, are slightly lower than the previously obtained values. Furthermore using the electric modulus formalismModulus Formalism it has been found that the Havriliak–Negami equation of the dielectric relaxation is capable of quantitatively describing the experimental data.