Electrical properties and percolation phenomena in carbon black filled polymer composites

Zois, H; Apekis, L; Omastova, M

dc.contributor.author	Zois, H	en
dc.contributor.author	Apekis, L	en
dc.contributor.author	Omastova, M	en
dc.date.accessioned	2014-03-01T01:14:34Z
dc.date.available	2014-03-01T01:14:34Z
dc.date.issued	1999	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13150
dc.subject	Critical Exponent	en
dc.subject	Dielectric Constant	en
dc.subject	Dielectric Permittivity	en
dc.subject	Dielectric Properties	en
dc.subject	Dielectric Relaxation	en
dc.subject	Electric Conductivity	en
dc.subject	Electrical Properties	en
dc.subject	Frequency Dependence	en
dc.subject	Percolation Theory	en
dc.subject	Percolation Threshold	en
dc.subject	Polypropylene	en
dc.subject	Carbon Black	en
dc.subject	Power Law	en
dc.subject.other	Carbon black	en
dc.subject.other	Dielectric relaxation	en
dc.subject.other	Electric conductivity measurement	en
dc.subject.other	Electric conductivity of solids	en
dc.subject.other	Percolation (solid state)	en
dc.subject.other	Permittivity	en
dc.subject.other	Polypropylenes	en
dc.subject.other	Spectroscopy	en
dc.subject.other	Thermogravimetric analysis	en
dc.subject.other	Dielectric behaviour	en
dc.subject.other	Dielectric relaxation phenomena	en
dc.subject.other	Composite materials	en
dc.title	Electrical properties and percolation phenomena in carbon black filled polymer composites	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/ISE.1999.832101	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ISE.1999.832101	en
heal.publicationDate	1999	en
heal.abstract	The electrical conductivity and related percolation phenomena in polypropylene/carbon black (PP/CB) composite systems have been studied. The carbon black concentration was systematically varied in a wide range. The electrical and dielectric properties of these materials were investigated by means of broadband ac (10-1-106 Hz) dielectric relaxation spectroscopy (DRS) techniques. By complex dielectric permittivity, ε*, measurements, the dependence of ac conductivity, σac, and dc conductivity, σdc, on the frequency and on the concentration of the conductive filler was investigated. The dielectric behaviour of this system can be satisfactorily described in terms of percolation theory. According to our results, the percolation threshold, PC, was calculated to be 6.2 wt. % CB. The concentration and frequency dependence of the conductivity was studied in detail. Both, dielectric constant and dc conductivity, follow power-law behaviour, yielding values for the critical exponents which are in good agreement with the theoretical ones.	en
heal.publisher	IEEE, Piscataway, NJ, United States	en
heal.journalName	Proceedings - International Symposium on Electrets	en
dc.identifier.doi	10.1109/ISE.1999.832101	en
dc.identifier.spage	529	en
dc.identifier.epage	532	en