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Synergy effects in dielectric and thermal properties of layered ethylene vinyl acetate composites with carbon and Fe 3 O 4 nanoparticles
Author(s) -
Bertasius Povilas,
Macutkevic Jan,
Banys Juras,
Gaidukovs Sergejs,
Barkane Anda,
Vaivodiss Romans
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48814
Subject(s) - composite material , materials science , percolation threshold , dielectric , carbon nanotube , nanocomposite , ethylene vinyl acetate , microwave , electrical resistivity and conductivity , polymer , physics , optoelectronics , copolymer , quantum mechanics , electrical engineering , engineering
Properties of layered composites with carbon nanotube (CNT), GnP, Fe 3 O 4 nanoinclusions, and hybrid composites with these nanoinclusions were investigated in the wide frequency range (from 20 Hz to 2 THz). All investigated composites (except with single Fe 3 O 4 inclusions) are above percolation threshold. The strong enhancement of microwave and terahertz radiation absorption is observed in hybrid composites in comparison with composites with single inclusions. The synergy effect is discussed in terms of the complex impedance and the distribution of relaxation times. At low temperatures (below 200 K), the electrical conductivity of all hybrid composites follows the tunneling law model and the lowest potential barrier was estimated for composites with CNT inclusions. The best thermal properties are observed for composites with CNT inclusions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48814.