Dielectric properties of polymers filled with dispersed metals

Mamunya, YeP; Davydenko, VV; Zois, H; Apekis, L; Snarskii, AA; Slipchenko, KV

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