Abstract
In this work, two different types of titanium dioxide, anatase and rutile, were blended into a bisphenol-A epoxy resin. The dielectric properties of epoxy nanocomposites were measured to investigate whether the filler crystal form affects the behaviors of epoxy resin. All nanoparticles have a same size of ∼ 60 nm and the content of the nanocomposites is from 1 to 4 wt%. The dielectric properties of epoxy nanocomposites, including complex permittivity dependence on frequencies, volume resistivity, and breakdown strength were measured. Although the band gap of anatase-type titanium dioxide is smaller than that of rutile-type titanium dioxide, its epoxy nanocomposite has a higher volume resistivity and a higher breakdown strength at each filler content. The anatase-type titanium dioxide is more favorable than rutile-type titanium dioxide to improve the dielectric properties of epoxy resin.
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