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Controlling dielectric permittivity and dielectric loss by starch‐coated silver nanoparticles in ethylene–propylene rubber
Author(s) -
Sadroddini M.,
RazzaghiKashani M.,
Miranzadeh M.,
Kassaee M.Z.
Publication year - 2018
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.24068
Subject(s) - materials science , composite material , dielectric , permittivity , dielectric loss , ethylene propylene rubber , starch , percolation threshold , composite number , natural rubber , polymer , electrical resistivity and conductivity , copolymer , electrical engineering , chemistry , optoelectronics , engineering , biochemistry
In this study, the effects of silver nanoparticles (AgNP) and starch‐coated ones (AgNP/starch) on dielectric properties of ethylene–propylene rubber (EPR) composites were compared. The dielectric permittivity of AgNP/EPR with 8 vol% of AgNP achieved 336 at 1 kHz which specifies the percolation threshold. AgNP/EPR composite with 6 vol% of filler as a near‐percolation sample was chosen to study the contribution of starch on dielectric properties. The AgNP/EPR composite showed relatively high dielectric permittivity and loss tangent ( ε ′ = 14.17 , tan δ = 0.04 , at 1 kHz), whereas AgNP/starch/EPR composite showed lower permittivity and loss ( ε ′ = 6.27 , tan δ = 0.02 , at 1 kHz), but with the advantage of more reduction in dielectric loss than dielectric permittivity. Moreover, better compatibility was observed between EPR and AgNP/starch particles, resulting in better dispersion of this coated filler, compared to AgNP. POLYM. COMPOS., 39:1303–1310, 2018. © 2016 Society of Plastics Engineers