TBU Publications
Repository of TBU Publications

AC conductivity of carbon fiber - polymer matrix

DSpace Repository

Show simple item record

dc.title AC conductivity of carbon fiber - polymer matrix en
dc.contributor.author Římská, Zdeňka
dc.contributor.author Křesálek, Vojtěch
dc.contributor.author Špaček, Josef
dc.relation.ispartof Polymer Composites
dc.identifier.issn 0272-8397 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2002
utb.relation.volume 23
utb.relation.issue 1
dc.citation.spage 95
dc.citation.epage 103
dc.type article
dc.language.iso en
dc.publisher Society of Plastics Engineers, Inc., Brookfield Center en
dc.identifier.doi 10.1002/pc.10415
dc.relation.uri https://onlinelibrary.wiley.com/doi/abs/10.1002/pc.10415
dc.relation.uri https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pc.10415?download=true
dc.subject uhlíková vlákna cs
dc.subject elektromagentická kompatibilita cs
dc.subject carbon fibers en
dc.subject electromagnetic compatibility en
dc.description.abstract This paper reports results on experimental investigation of the conductivity behavior of carbon fiber filled polymer composites at the percolation threshold. Two types of carbon fiber - epoxy matrix composites have been studied and comparison of the measured data has been made. These two types of composites differ in the surface modification of carbon fibers (in one case the surface of carbon fibers is covered with polymer beads using the microencapsulation technology, in the other their surface stayed unmodified). Experimental data reveal that surface modification of carbon fibers influences greatly the DC conductivity (percolation threshold moves to higher concentrations) but does not influence the AC electrical properties. From the frequency dependence of conductivity on fiber concentration it becomes clear that it is not possible to predict the high frequency conductivity (electromagnetic interference shielding properties) based on the DC conductivity. Percolation behavior of conductivity as a function of conductive filler concentration is typical only for DC or low frequency AC conductivity. The percolation threshold gradually vanishes for high frequencies of electromagnetic field. The temperature dependence of electrical properties has also been studied. Composites with concentration near the percolation threshold show the switch-off effect (at the specific temperature the DC conductivity drops by several orders of magnitude). This switch-off effect does not occur for high frequency AC conductivity. en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1000147
utb.identifier.rivid RIV/70883521:28110/02:63500730
utb.identifier.obdid 11052609
utb.identifier.scopus 2-s2.0-0036465909
utb.identifier.wok 000174111400010
utb.source j-riv
utb.contributor.internalauthor Římská, Zdeňka
utb.contributor.internalauthor Křesálek, Vojtěch
utb.contributor.internalauthor Špaček, Josef
utb.fulltext.affiliation ZDEŇKA ŘÍMSKÁ*, VOJTĚCH KŘESÁLEK**, and JOSEF ŠPAČEK*** *Department of Physics and Materials Engineering **Department of Automatic Control ***Department of Plastics and Rubber Technology Faculty of Technology Zlín, Tom Bata University TGM 275, 762 72 Zlín, Czech Republic *Corresponding author. e-mati: kresak&@ft.vtb.cz
utb.fulltext.dates -
utb.fulltext.sponsorship The financial support of the Grant Agency of the Czech Republic (Grant No. 101/97/0308) and Ministry of Education, Youth and Sports of the Czech Republic (Grant No. Jp MSM 265200015) is gratefully acknowledged.
utb.fulltext.projects GACR 101/97/0308
utb.fulltext.projects MSM 265200015
utb.fulltext.faculty Faculty of Technology
utb.fulltext.ou Department of Physics and Materials Engineering
utb.fulltext.ou Department of Automatic Control
utb.fulltext.ou Department of Plastics and Rubber Technology
Find Full text

Files in this item

Show simple item record