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A study on electrical and thermal conductivities of ethylene-octene copolymer/expandable graphite composites

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dc.title A study on electrical and thermal conductivities of ethylene-octene copolymer/expandable graphite composites en
dc.contributor.author Svoboda (FT), Petr
dc.contributor.author Theravalappil, Rajesh
dc.contributor.author Poongavalappil, Sameepa
dc.contributor.author Vilčáková, Jarmila
dc.contributor.author Svobodová, Dagmar
dc.contributor.author Mokrejš, Pavel
dc.contributor.author Blaha, Antonín
dc.relation.ispartof Polymer Engineering and Science
dc.identifier.issn 0032-3888 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2012
utb.relation.volume 52
utb.relation.issue 6
dc.citation.spage 1241
dc.citation.epage 1249
dc.type article
dc.language.iso en
dc.publisher Wiley-Blackwell en
dc.identifier.doi 10.1002/pen.22192
dc.relation.uri http://onlinelibrary.wiley.com/doi/10.1002/pen.22192/abstract
dc.description.abstract A series of ethylene-octene copolymer (EOC) composites have been prepared by melt-mixing with different weight ratios of expandable graphite filler (0-50% by weight). Electrical conductivity [both alternating current (AC) and direct current (DC)] and thermal conductivity studies were carried out. Effect of filler loading and frequency on electrical conductivity was studied. DC conductivity has increased from 1.51 × 10-13 S cm-1 to 1.17 × 10-1 S cm-1. Percolation threshold by DC and also AC methods was observed at about 16 vol% of the filler. Real part of permittivity was found to be decreasing with increase in frequency while conductivity was increasing. Thermal conductivity was also found to be increasing gradually from 0.196 to 0.676 Wm-1 K-1 which is about 245% increase. Graphite not only increases the electrical and thermal conductivities but at and above 40 wt%, also acts as a halogen-free, environmental friendly flame retardant. Shore-A hardness of EOC/graphite composites shows that even with high graphite loading, the hardness is increased from about 50-68 only so that the rubbery nature of the composite is not affected very much. © 2012 Society of Plastics Engineers. en
utb.faculty Faculty of Technology
utb.faculty Faculty of Humanities
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1002836
utb.identifier.rivid RIV/70883521:28110/12:43868099!RIV13-MSM-28110___
utb.identifier.rivid RIV/70883521:28150/12:43868099!RIV13-MSM-28150___
utb.identifier.rivid RIV/70883521:28610/12:43868099!RIV13-MSM-28610___
utb.identifier.obdid 43868190
utb.identifier.scopus 2-s2.0-84861346649
utb.identifier.wok 000304091300009
utb.identifier.coden PYESA
utb.source j-scopus
dc.date.accessioned 2012-06-08T07:47:25Z
dc.date.available 2012-06-08T07:47:25Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Svoboda (FT), Petr
utb.contributor.internalauthor Theravalappil, Rajesh
utb.contributor.internalauthor Poongavalappil, Sameepa
utb.contributor.internalauthor Vilčáková, Jarmila
utb.contributor.internalauthor Svobodová, Dagmar
utb.contributor.internalauthor Mokrejš, Pavel
utb.contributor.internalauthor Blaha, Antonín
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