Electrical properties of carbon black-filled polymer composites

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dc.contributor.author Zois, H en
dc.contributor.author Apekis, L en
dc.contributor.author Omastova, M en
dc.date.accessioned 2014-03-01T02:41:52Z
dc.date.available 2014-03-01T02:41:52Z
dc.date.issued 2001 en
dc.identifier.issn 1022-1360 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/30636
dc.subject Electrical Properties en
dc.subject Carbon Black en
dc.subject.classification Polymer Science en
dc.subject.other carbon en
dc.subject.other polymer en
dc.subject.other concentration (parameters) en
dc.subject.other conference paper en
dc.subject.other dielectric constant en
dc.subject.other electric conductivity en
dc.subject.other measurement en
dc.subject.other permeability en
dc.subject.other spectroscopy en
dc.subject.other temperature dependence en
dc.title Electrical properties of carbon black-filled polymer composites en
heal.type conferenceItem en
heal.identifier.primary 10.1002/1521-3900(200106)170:1<249::AID-MASY249>3.0.CO;2-F en
heal.identifier.secondary http://dx.doi.org/10.1002/1521-3900(200106)170:1<249::AID-MASY249>3.0.CO;2-F en
heal.language English en
heal.publicationDate 2001 en
heal.abstract This work deals with the dielectric properties of conductive composite materials, which consist of thermoplastic polypropylene (PP) matrix filled with carbon black (CB). The CB concentration was systematically varied in a wide range. Our main interest is focused on the investigation of electrical conductivity mechanism and related percolation phenomena in these materials. To study the electrical and dielectric properties of composites we used broadband ac dielectric relaxation spectroscopy (DRS) techniques in a wide temperature range. By measurements of complex dielectric permittivity, epsilon*, the dependence of ac conductivity, sigma (ac), and dc conductivity, sigma (dc), on the frequency, the temperature and the concentration of the conductive filler was investigated. The behavior of this system is described by means of percolation theory. The percolation threshold, P-C, value was calculated to be 6.2 wt. % CB. Both, dielectric constant and dc conductivity follow power-law behavior, yielding values for the critical exponents, which are in good agreement with the theoretical ones. Indications for tunneling effect in the charge carriers transport through the composites are presented. The temperature dependence of dc conductivity gives evidence for the presence of positive temperature coefficient (PTC) effect. en
heal.publisher WILEY-V C H VERLAG GMBH en
heal.journalName Macromolecular Symposia en
dc.identifier.doi 10.1002/1521-3900(200106)170:1<249::AID-MASY249>3.0.CO;2-F en
dc.identifier.isi ISI:000170297500029 en
dc.identifier.volume 170 en
dc.identifier.spage 249 en
dc.identifier.epage 256 en

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