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BaTiO 3 incorporation effect on the dielectric properties of polymer from aqueous emulsion: An enhanced dispersion technique
Author(s) -
Zyane Adel,
Belfkira Ahmed,
Brouillette François,
Marchet Pascal,
Lucas Romain
Publication year - 2016
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.44333
Subject(s) - materials science , dielectric , dispersion (optics) , composite material , vinyl acetate , emulsion , vinyl ester , composite number , polymer , aqueous solution , copolymer , viscosity , chemical engineering , polymer chemistry , organic chemistry , chemistry , physics , optoelectronics , optics , engineering
An economic and environment friendly process was adapted to synthesize new dielectric composite materials. Using ethylene vinyl acetate (EVA)/vinyl ester of versatic acid (VeoVa) terpolymer as an aqueous emulsion provides a homogenous dispersion of BaTiO 3 (BT) particles, due to the high viscosity and polarity of the vinyl resin (VR). Composites films were obtained from these dispersions by water evaporation. The evolution of the dielectric properties as a function of the BaTiO 3 content, was correctly fitted by a Maxwell‐Garnett model. This fitting of the experimental curve shows a good dispersion of filler in the vinyl resin and the particles separation by a layer of resin as expected for the preparation method used in this study. The VR/BT composites show good synergy between the dielectric properties of the different phases of the composites due to the formation of macrodipoles and to the strong interactions between polar EVA/VeoVa groups and the BaTiO 3 particles surface. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 44333.