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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 |