Surface modification of BaTiO3 inclusions in polydicyclopentadiene nanocomposites for energy storage
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Abstract
ABSTRACT A new nanocomposite system displaying high breakdown strength, improved permittivity, low dielectric loss, and high thermal stability is presented. Free‐standing nanocomposite films were prepared via a solvent‐free in‐situ polymerization technique whereby 5 vol % BaTiO 3 (BT) nanocrystals with tailored surface chemistry were dispersed in dicyclopentadiene (DCPD) prior to initiation of ring opening metathesis polymerization by a second generation Grubbs catalyst. The relative permittivity was enhanced from 1.7 in the neat poly(DCPD) film to a maximum of 2.4 in the composite, while the dielectric loss tangent was minimized below 0.7%. Surface modification of the BT nanocrystals mitigated reduction in breakdown strength of the resulting nanocomposites such that only a 13% reduction in breakdown strength was observed relative to the neat polymer films. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40290.
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