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Enhancement of dielectric and energy density properties in the PVDF‐based copolymer/terpolymer blends
Author(s) -
Ullah Amir,
Rahman Ata,
Won Ahn Chang,
Rahman Muneebur,
Ullah Aman,
Rehman Ziaur,
Javid Iqbal Muhammad,
Kim Ill Won
Publication year - 2015
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24083
Subject(s) - copolymer , materials science , dielectric , ferroelectricity , polymer blend , polymer , doping , electric field , polarization (electrochemistry) , polymer chemistry , composite material , chemistry , optoelectronics , physics , quantum mechanics
We investigated the high dielectric constant and energy storage density for the blends of P(VDF‐TrFE) copolymer and P(VDF‐TrFE‐CFE) terpolymer. The degradation of coercive field ( E c ) and remnant polarization ( P r ) of the copolymer under an electric field of 125 MV/m was observed and the copolymer changed into a typical relaxor ferroelectric with doping of terpolymer. The dielectric constant of P(VDF‐TrFE) was found to be ∼11, but was enhanced to ∼55 by blending with P(VDF‐TrFE‐CFE) at 60 wt%. Consequently, a higher energy density of about 4.2 J/cm 3 was obtained in these blends in contrast to about 3.6 J/cm 3 in the terpolymer at the very low applied electric field of 125 MV/m. These results demonstrate the promise of blend approaches for tailoring and enhancing the dielectric properties of ferroelectric polymers. POLYM. ENG. SCI., 55:1396–1402, 2015. © 2015 Society of Plastics Engineers