Dielectric properties and morphology of polymer composites filled with dispersed iron

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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 http://hdl.handle.net/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

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