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Dielectric properties of polymers filled with dispersed metals

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dc.contributor.author Mamunya, YeP en
dc.contributor.author Davydenko, VV en
dc.contributor.author Zois, H en
dc.contributor.author Apekis, L en
dc.contributor.author Snarskii, AA en
dc.contributor.author Slipchenko, KV en
dc.date.accessioned 2014-03-01T01:17:42Z
dc.date.available 2014-03-01T01:17:42Z
dc.date.issued 2002 en
dc.identifier.issn 0967-3911 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/14632
dc.relation.uri http://www.scopus.com/inward/record.url?eid=2-s2.0-0036411835&partnerID=40&md5=cba11c068c789da1de449416e960e47c en
dc.subject.classification Materials Science, Characterization & Testing en
dc.subject.classification Materials Science, Composites en
dc.subject.classification Polymer Science en
dc.subject.other Copper alloys en
dc.subject.other Dielectric losses en
dc.subject.other Fillers en
dc.subject.other Metallic matrix composites en
dc.subject.other Nickel alloys en
dc.subject.other Particle size analysis en
dc.subject.other Percolation (solid state) en
dc.subject.other Permittivity en
dc.subject.other Structure (composition) en
dc.subject.other Thermoplastics en
dc.subject.other Thermosets en
dc.subject.other Volume fraction en
dc.subject.other Dielectric loss tangent en
dc.subject.other Particle distribution en
dc.subject.other Power-law behaviour en
dc.subject.other Organic polymers en
dc.title Dielectric properties of polymers filled with dispersed metals en
heal.type journalArticle en
heal.language English en
heal.publicationDate 2002 en
heal.abstract The authors have studied the dielectric properties of composite materials based on both thermoplastic and thermoset resins filled with nickel or copper, with various particle sizes and shapes. In addition, two types of particle distribution, random and segregated, were produced for composites filled with nickel. The main objective was to study the effect of the above factors on the dielectric properties of the composites. The concentration dependence of the dielectric parameters (i.e. the real, epsilon' and the imaginary, epsilon", parts of the complex dielectric permittivity and the dielectric loss tangent, tandelta), calculated for all the systems studied, demonstrates a critical behaviour in the percolation threshold region, with maximum values reached at a volume fraction phi = phi(c). The dependence of the dielectric parameters on concentration follows power-law behaviour in the phi < phi(c) region, The critical exponent value for epsilon' is q = 0.75, in agreement with the theoretical one. The dielectric characteristics of the filled composites are more sensitive to the spatial filler distribution. For the segregated PVC-Ni system with an ordered filler distribution, the value of phi(c) is much lower than for ER-Ni composites with a random filler distribution. Besides, for the segregated PVC-Ni system, the value of q is not constant, as it depends on the filler concentration. A model for the structure, which explains this behaviour, is proposed. en
heal.publisher RAPRA TECHNOLOGY LTD en
heal.journalName Polymers and Polymer Composites en
dc.identifier.isi ISI:000175087600004 en
dc.identifier.volume 10 en
dc.identifier.issue 3 en
dc.identifier.spage 219 en
dc.identifier.epage 227 en


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