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Conductive mechanism of polymer/graphite conducting composites with low percolation threshold

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dc.contributor.author Bershtein, VA en
dc.contributor.author Egorova, LM en
dc.contributor.author Yakushev, PN en
dc.contributor.author Pissis, P en
dc.contributor.author Sysel, P en
dc.contributor.author Brozova, L en
dc.date.accessioned 2014-03-01T01:51:50Z
dc.date.available 2014-03-01T01:51:50Z
dc.date.issued 2002 en
dc.identifier.issn 08876266 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/26478
dc.subject Conducting composites en
dc.subject Expanded graphite en
dc.subject Nylon-6 en
dc.subject Percolation threshold en
dc.subject Polystyrene en
dc.subject.other Calculations en
dc.subject.other Electric conductivity of solids en
dc.subject.other Graphite en
dc.subject.other Nonmetallic matrix composites en
dc.subject.other Nylon polymers en
dc.subject.other Optical microscopy en
dc.subject.other Percolation (solid state) en
dc.subject.other Polymerization en
dc.subject.other Flory theory en
dc.subject.other Optical micrographs en
dc.subject.other Polystyrenes en
dc.title Conductive mechanism of polymer/graphite conducting composites with low percolation threshold en
heal.type journalArticle en
heal.identifier.primary 10.1002/polb.10141 en
heal.identifier.secondary http://dx.doi.org/10.1002/polb.10141 en
heal.publicationDate 2002 en
heal.abstract Preparation of the conducting composites of polystyrene/expanded graphite via in situ polymerization and investigation of the conductive mechanism were carried out. They are characterized by high conductivity and a low percolation threshold. The electrical conductivity reached 10-2 S/cm with 3.0 vol % expanded graphite content, whereas the percolation threshold was 1.0 vol %. Optical micrographs revealed the heterogeneous distribution of the graphite particles and the formation of a conductive network in the polymer matrix. A model of primary particle was proposed to interpret the conductive phenomena. The primary particle is the basic conductive unit in the composites that comprises three of the following parts: the graphite particle, the compact-adsorbed layer, and the wrapping shell. Our model was also used to explain the experimental data in our previous studies on nylon-6/expanded graphite composites. A low percolation threshold of conducting composites can be also explained according to the model of the primary particle. Furthermore, the theoretical line of conductivity versus primary particle content calculated from the revised Flory's theory fits the experimental data well. en
heal.journalName Journal of Polymer Science, Part B: Polymer Physics en
dc.identifier.doi 10.1002/polb.10141 en
dc.identifier.volume 40 en
dc.identifier.issue 10 en
dc.identifier.spage 954 en
dc.identifier.epage 963 en


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