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Dielectric properties of polydimethylsiloxane composites filled with SrTiO 3 nanoparticles
Author(s) -
Bertasius Povilas,
Schaefer Sebastien,
Macutkevic Jan,
Banys Juras,
Selskis Algirdas,
Fierro Vanessa,
Celzard Alain
Publication year - 2021
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.26031
Subject(s) - materials science , dielectric , polydimethylsiloxane , composite material , relaxation (psychology) , nanocomposite , dispersion (optics) , atmospheric temperature range , nanoparticle , range (aeronautics) , polymer , nanotechnology , optics , thermodynamics , optoelectronics , psychology , social psychology , physics
This article deals with the dielectric properties of polydimethylsiloxane (PDMS) nanocomposites filled with SrTiO 3 nanoparticles. The investigations were performed over a very broad range of frequencies (20 Hz to 3 THz). Almost no dielectric dispersion was observed in all the composites at room temperature over the entire range of measurement frequencies, and the dielectric losses were also very low under these conditions (<1.9). The dielectric dispersion was observed at lower temperatures (below 280 K), due to relaxation at the PDMS/SrTiO 3 interface and in the bulk polymer. The relaxation time for both cases followed the Vogel–Vulcher law, while the freezing temperature was substantially lower for relaxation at the PDMS/SrTiO 3 interface.