Electric modulus and interfacial polarization in composite polymeric systems

Tsangaris, GM; Psarras, GC; Kouloumbi, N

dc.contributor.author	Tsangaris, GM	en
dc.contributor.author	Psarras, GC	en
dc.contributor.author	Kouloumbi, N	en
dc.date.accessioned	2014-03-01T01:13:43Z
dc.date.available	2014-03-01T01:13:43Z
dc.date.issued	1998	en
dc.identifier.issn	0022-2461	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12678
dc.subject	Dielectric Permittivity	en
dc.subject	Dielectric Relaxation	en
dc.subject	Epoxy Resin	en
dc.subject	Experimental Data	en
dc.subject	Ionic Conductivity	en
dc.subject	Low Frequency	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Correlation methods	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Interfaces (materials)	en
dc.subject.other	Ionic conduction in solids	en
dc.subject.other	Mathematical models	en
dc.subject.other	Permittivity	en
dc.subject.other	Polarization	en
dc.subject.other	Composite polymeric systems	en
dc.subject.other	Electric modulus	en
dc.subject.other	Interfacial polarization	en
dc.subject.other	Fiber reinforced materials	en
dc.title	Electric modulus and interfacial polarization in composite polymeric systems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/A:1004398514901	en
heal.identifier.secondary	http://dx.doi.org/10.1023/A:1004398514901	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The applicability of the electric modulus formalism is investigated on a Debye-type relaxation process, the interfacial polarization or Maxwell-Wagner-Sillars effect. Electric modulus, which has been proposed for the description of systems with ionic conductivity and related relaxation processes, presents advantages in comparison to the classical approach of the real and imaginary part of dielectric permittivity. In composite polymeric materials, relaxation phenomena in the low-frequency region are attributed to the heterogeneity of the systems. For the investigation of these processes through electric modulus formalism, hybrid composite systems consisting of epoxy resin-metal powder-aramid fibres were prepared with various filler contents and their dielectric spectra were recorded in the frequency range 10 Hz-10 MHz in the temperature interval 30-150 degrees C. The Debye, Cole-Cole, Davidson-Cole and Havriliak-Negami equations of dielectric relaxation are expressed in the electric modulus form. Correlation between experimental data and the various expressions produced, shows that interfacial polarization in the systems examined is, mostly, better described by the Davidson-Cole approach and only in the system with the higher heterogeneity must the Havriliak-Negami approach be used. (C) 1998 Chapman and Hall.	en
heal.publisher	KLUWER ACADEMIC PUBL	en
heal.journalName	Journal of Materials Science	en
dc.identifier.doi	10.1023/A:1004398514901	en
dc.identifier.isi	ISI:000073101400008	en
dc.identifier.volume	33	en
dc.identifier.issue	8	en
dc.identifier.spage	2027	en
dc.identifier.epage	2037	en