Effects of curing agent on conductivity, structural and dielectric properties of an epoxy polymer

Abstract : View at Publisher| Export | Download | Add to List | More... Polymer (United Kingdom) Volume 79, 19 November 2015, Pages 73-81 Effects of curing agent on conductivity, structural and dielectric properties of an epoxy polymer (Article) Jilani, W.a , Mzabi, N.a, Fourati, N.b, Zerrouki, C.b, Gallot-Lavallée, O.c, Zerrouki, R.de, Guermazi, H.a a Unity of Physics of Insulating and Semi-Insulating Materials, Faculty of Sciences of Sfax, University of Sfax, B.P. 1171, Sfax, Tunisia b SATIE, UMR 8029, CNRS, ENS Cachan, Cnam, 292 rue Saint Martin, Paris, France c Grenoble Electrical Engineering Laboratory (G2ELab), Grenoble University Alpes, CNRS, UGA, Grenoble, France View additional affiliations View references (39) Abstract Two epoxy polymers were prepared by curing the diglycidyl ether of bisphenol A (DGEBA) epoxy resin with two hardeners: the ethylenediamine (EDA) and the 3,3′-diaminodiphenyl sulfone (33′DDS) which are respectively aliphatic and aromatic. Structural properties of DGEBA/EDA and DGEBA/33′DDS polymers were investigated by means of grazing incidence X-ray reflectometry. Their dielectric properties were studied using the dielectric relaxation spectroscopy (DRS) over wide ranges of temperature (from -80 to 200°C) and frequency (from 10-1-106 Hz), and thermally stimulated depolarization current (TSDC) technique. X-ray data revealed the presence of a locally periodic nanostructure in polymer cured with the aromatic hardener (DGEBA/33′DDS). γ and α dipolar relaxations were highlighted for the two polymers while the Maxwell-Wagner-Sillars (MWS) relaxation appears only in the DGEBA/33′DDS. The electric modulus data were fitted using Havriliak-Negami approch. Conductive properties of epoxies were investigated. Ac conductivity data reveal that DGEBA/EDA is more conductive than the DGEBA/33′DDS.
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Article dans une revue
Polymer, Elsevier, 2015, 79, pp.73-81. 〈10.1016/j.polymer.2015.09.078〉
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Soumis le : mardi 12 janvier 2016 - 14:54:32
Dernière modification le : lundi 22 janvier 2018 - 11:12:36

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Wissal Jilani, N. Mzabi, Chouki Zerrouki, N. Fourati, Olivier Gallot-Lavallée, et al.. Effects of curing agent on conductivity, structural and dielectric properties of an epoxy polymer. Polymer, Elsevier, 2015, 79, pp.73-81. 〈10.1016/j.polymer.2015.09.078〉. 〈hal-01254618〉

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