Impact of Charge Transfer Complex on the Dielectric Relaxation Processes in Poly(methyl methacrylate) Polymer

The impact of the charge transfer complex on the dielectric relaxation processes in free poly(methyl methacrylate) (PMMA) polymer sheets was investigated. The frequency dependence of dielectric properties was obtained over the frequency range 0.1 Hz-1 MHz at temperatures ranging between 303 K and 373 K for perylene dye and acceptors (picric acid (PA) and chloranilic acid (CLA)) in an in situ PMMA polymer. The TG/dTG technique was used to investigate the thermal degradation of the synthesized polymeric sheets. Additionally, the kinetic parameters have been assessed using the Coats-Redfern relation. The dielectric relaxation spectroscopy of the synthesized polymeric sheets was analyzed in terms of complex dielectric constant, dielectric loss, electrical modulus, electrical conductivity, and Cole-Cole impedance spectroscopy. alpha- and beta-relaxation processes were detected and discussed. The sigma(omega) dispersion curves of the synthesized polymeric sheets show two distinct regions with increasing frequency. The impedance data of the synthesized polymeric sheets can be represented by the equivalent circuit (parallel RC).

Automated summary

This study investigates the impact of charge transfer complex on dielectric relaxation processes in free PMMA polymer sheets. The frequency dependence of dielectric properties is analyzed over a range of frequencies and temperatures for perylene dye and acceptors in the PMMA polymer. Thermal degradation of the synthesized polymeric sheets is examined using TG/dTG technique. The study also evaluates kinetic parameters using the Coats-Redfern relation. The dielectric relaxation spectroscopy reveals the existence of alpha- and beta-relaxation processes in the synthesized polymeric sheets.