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dc.contributor.authorKúdelčík, Jozef
dc.contributor.authorHardoň, Štefan
dc.contributor.authorHockicko, Peter
dc.contributor.authorKúdelčíková, Mária
dc.contributor.authorHornak, Jaroslav
dc.contributor.authorProsr, Pavel
dc.contributor.authorTrnka, Pavel
dc.date.accessioned2021-08-30T10:00:15Z-
dc.date.available2021-08-30T10:00:15Z-
dc.date.issued2021
dc.identifier.citationKÚDELČÍK, J., HARDOŇ, Š., HOCKICKO, P., KÚDELČÍKOVÁ, M., HORNAK, J., PROSR, P., TRNKA, P. Study of the complex permittivity of a polyurethane matrix modified by nanoparticles. IEEE Access, 2021, roč. 9, č. March 2021, s. 49547 - 49556. ISSN 2169-3536.cs
dc.identifier.issn2169-3536
dc.identifier.uri2-s2.0-85107181064
dc.identifier.urihttp://hdl.handle.net/11025/44955
dc.format10 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherIEEEen
dc.relation.ispartofseriesIEEE Accessen
dc.rights© IEEEen
dc.titleStudy of the complex permittivity of a polyurethane matrix modified by nanoparticlesen
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedThis study presents the influence of various types of nanoparticle (NP) fillers incorporated into a polyurethane (PU) (VUKOL 022) matrix and its subsequent changes in complex permittivity. Two types of surface modification of SiO2 fillers were investigated. The frequency dependence of the real and imaginary parts of complex permittivity was measured within the frequency range of 1 mHz to 1 MHz using the capacitance method. The 1 wt.% NPs in PU caused an increase (MgO, TiO2, n-SiO2, and f-SiO2) or a decrease (d-SiO2) in the real permittivity. The relaxation and intermediate dipolar effect were observed at the temperature dependence of the imaginary permittivity. The change in permittivity by various surface modifications of SiO2 and other nanofillers was discussed based on the multi-core model. Moreover, the NPs caused a shift in the local maximum of the permittivity, which was a result of the interfacial polarisation and a charge multiplication of the relaxation process.en
dc.subject.translatedpolyurethaneen
dc.subject.translatednanoparticlesen
dc.subject.translatedrelaxation methodsen
dc.subject.translatednanocompositesen
dc.identifier.doi10.1109/ACCESS.2021.3069144
dc.type.statusPeer-revieweden
dc.identifier.document-number637524100001
dc.identifier.obd43932931
dc.project.IDSGS-2021-003/Materiály, technologie a diagnostika v elektrotechnicecs
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