Re-examination of the dielectric spectra of epoxy resins: Bulk charge transport and interfacial polarization peaks

Chalashkanov, N. M., Dodd, S. J., Dissado, L. A. & Fothergill, J. (2014). Re-examination of the dielectric spectra of epoxy resins: Bulk charge transport and interfacial polarization peaks. IEEE Transactions on Dielectrics and Electrical Insulation, 21(3), pp. 1330-1341. doi: 10.1109/TDEI.2014.6832281

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Abstract

The dielectric properties of two amine cured bisphenol-A epoxy resin systems, Araldite CY1301 and Araldite CY1311 have been characterized using dielectric spectroscopy over the frequency range 1 mHz to 100 kHz. These two epoxy resin systems were chosen to allow the dielectric response to be studied from above and below the glass transition, as Araldite CY1311 is a modified version (with added plasticizer) of Araldite CY1301. The dielectric response was found to comprise both bulk and interfacial features. Above the glass transition temperature, two processes were identified, a low frequency process usually ascribed to interfacial polarization is shown to be a bulk process termed Quasi-DC (QDC) conduction and a dielectric dispersion usually taken to be a bulk process has been shown to be an interfacial effect.

Item Type: Article
Additional Information: © 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Epoxy resins, Dielectric measurements, Dielectric polarization, Charge transport, Equivalent circuits, Interface
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Vice-Chancellor's Portfolio
URI: http://openaccess.city.ac.uk/id/eprint/3827

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