Dielectric properties and morphology of polymer composites filled with dispersed iron

Zois, H; Apekis, L; Mamunya, YP

dc.contributor.author	Zois, H	en
dc.contributor.author	Apekis, L	en
dc.contributor.author	Mamunya, YP	en
dc.date.accessioned	2014-03-01T01:18:52Z
dc.date.available	2014-03-01T01:18:52Z
dc.date.issued	2003	en
dc.identifier.issn	0021-8995	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15238
dc.subject	Composites	en
dc.subject	Dielectric properties	en
dc.subject	Morphology	en
dc.subject	Percolation	en
dc.subject	Structure-property relations	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Dielectric losses	en
dc.subject.other	Fillers	en
dc.subject.other	Morphology	en
dc.subject.other	Permittivity	en
dc.subject.other	Polyamides	en
dc.subject.other	Polyethylenes	en
dc.subject.other	Structure (composition)	en
dc.subject.other	Polymer composites	en
dc.subject.other	Composite materials	en
dc.subject.other	composite	en
dc.subject.other	dielectric property	en
dc.subject.other	morphology	en
dc.subject.other	polyamide	en
dc.subject.other	polyethylene	en
dc.title	Dielectric properties and morphology of polymer composites filled with dispersed iron	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/app.12118	en
heal.identifier.secondary	http://dx.doi.org/10.1002/app.12118	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	The dielectric properties and the structure of various metal-polymer composites, based on a polymer matrix of polyamide (PA), polyethylene (PE), polyoxymethylene (POM), or blend PE/POM filled with dispersed iron (Fe) particles, have been investigated in this work. In PE-Fe, PA-Fe, and POM-Fe composites the filler spatial distribution is random. In the PE/POM-Fe composites, the polymer matrix is two-phase and the filler particles are localized only in the POM phase, resulting in an ordered distribution of the dispersed filler particles within the blend. The concentration and frequency dependence of the dielectric permittivity, epsilon', and the dielectric loss tangent, tandelta, are described in terms of the percolation theory. The experimental values of the critical exponents (namely, s, r, and y) are in good agreement with those predicted by the theory for the composites with random filler distribution. The PE/POM-Fe composites demonstrate low value of the percolation threshold, P,, and high values of the critical exponents r and y. This is attributed to the specific structure of these composites. A schematic model for the morphology of the composites studied has been proposed. This model explains the peculiar behavior of the PE/POM-Fe composites by assuming ordered distribution of the filler particles in a binary polymer matrix. The proposed model is in good agreement with the results of optical microscopy. (C) 2003 Wiley Periodicals, Inc.	en
heal.publisher	JOHN WILEY & SONS INC	en
heal.journalName	Journal of Applied Polymer Science	en
dc.identifier.doi	10.1002/app.12118	en
dc.identifier.isi	ISI:000182164600023	en
dc.identifier.volume	88	en
dc.identifier.issue	13	en
dc.identifier.spage	3013	en
dc.identifier.epage	3020	en