Broadband Dielectric Properties of Onion-Like Carbon/Polyurethane Composites Full article
| Journal |
Physica Status Solidi (A) Applications and Materials (after 2004)
ISSN: 1862-6300 , E-ISSN: 1862-6319 |
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| Output data | Year: 2013, Volume: 210, Number: 12, Pages: 2683-2688 Pages count : 6 DOI: 10.1002/pssa.201330257 | ||||||
| Tags | PERCOLATION-THRESHOLD; RELAXATION | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | European Commission |
Abstract:
The results of an investigation of the broadband dielectric properties of onion-like carbon (OLC)/polyurethane (PU) composites over a wide temperature range (300–450 K) are presented. The onset of the percolation threshold reached at 10 vol% of OLC is accompanied by drastically increased microwave absorption. The broadband dielectric properties of the composites at low loading of OLC, below the percolation threshold, are mainly governed by the α relaxation, the dynamics of the “soft” molecular segment of the PU chain. With increased OLC concentration, the glass-transition temperature decreases and the α relaxation completely vanishes for the composite with 5 vol% OLC. As the α relaxation vanishes rapid enhancement of the mobility of the soft molecular segments in PU chains occurs and a decrease of the activation energy of electrical conductivity follows.Keywords: composites; dielectric properties; onion-like carbon
Cite:
Macutkevic J.
, Banys J.
, Kuznetsov V.
, Moseenkov S.
, Shenderova O.
Broadband Dielectric Properties of Onion-Like Carbon/Polyurethane Composites
Physica Status Solidi (A) Applications and Materials (after 2004). 2013. V.210. N12. P.2683-2688. DOI: 10.1002/pssa.201330257 WOS Scopus РИНЦ ANCAN OpenAlex
Broadband Dielectric Properties of Onion-Like Carbon/Polyurethane Composites
Physica Status Solidi (A) Applications and Materials (after 2004). 2013. V.210. N12. P.2683-2688. DOI: 10.1002/pssa.201330257 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Aug 28, 2013 |
| Accepted: | Sep 11, 2013 |
| Published online: | Oct 4, 2013 |
| Published print: | Dec 1, 2013 |
Identifiers:
| Web of science: | WOS:000328452500024 |
| Scopus: | 2-s2.0-84890432466 |
| Elibrary: | 21466465 |
| Chemical Abstracts: | 2013:1608009 |
| Chemical Abstracts (print): | 160:496280 |
| OpenAlex: | W1585319542 |