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

Arwa Alrooqi; Zahra M Al-Amshany; Laila M Al-Harbi; Tariq A Altalhi; Moamen S Refat; A M Hassanien; A A Atta

doi:10.3390/molecules27061993

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

Molecules. 2022 Mar 19;27(6):1993. doi: 10.3390/molecules27061993.

Authors

Arwa Alrooqi^{1

2}, Zahra M Al-Amshany¹, Laila M Al-Harbi¹, Tariq A Altalhi³, Moamen S Refat³, A M Hassanien⁴, A A Atta⁵

Affiliations

¹ Department of Chemistry, Faculty of Sciences, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
² Department of Chemistry, Faculty of Arts and Science, Al-Baha University, P.O. Box 1988, Baljurashi 65634, Saudi Arabia.
³ Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.
⁴ Department of Physics, College of Science and Humanities, Shaqra University, P.O. Box 1040, Al Quwaiiyah 11971, Saudi Arabia.
⁵ Department of Physics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.

Abstract

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. α- and β-relaxation processes were detected and discussed. The σ(ω) 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).

Keywords: PMMA polymer; charge transfer complexes; relaxation processes.