Eur. Phys. J. Plus (2015) 130: 235
https://doi.org/10.1140/epjp/i2015-15235-9

Regular Article

Study of AC electrical conduction mechanisms in an epoxy polymer

¹ Unity of Physics of Insulating, Semi-Insulating Materials, Faculty of Sciences of Sfax, B.P. 1171, 3000, Sfax, Tunisia
² Grenoble Electrical Engineering Laboratory (G2ELab), Grenoble University Alpes & CNRS (UGA), Grenoble, France
³ SATIE, UMR 8029, CNRS, ENS Cachan, Cnam, 292 rue Saint Martin, 75003, Paris, France
⁴ Université de Limoges, 123 Avenue Albert Thomas, 87060, Limoges Cedex, France
⁵ Université du Québec à Trois-Rivières, CRML, 3351 boul. des Forges, G9A 5H7, Trois-Rivières (QC), Canada

^* e-mail: jilaniwissal@yahoo.fr

Received: 7 April 2015
Accepted: 18 October 2015
Published online: 25 November 2015

Abstract

The AC conductivity of an epoxy resin was investigated in the frequency range Hz at temperatures ranging from -100 to 120 ^°C. The frequency dependence of was described by the law: . The study of temperature variation of the exponent (s) reveals two conduction models: the AC conduction dependence upon temperature is governed by the small polaron tunneling mechanism (SPTM) at low temperature (-100 -60 ^°C) and the correlated barrier hopping (CHB) model at high temperature (80-120 ^°C).