Abstract
The dielectric properties of poly (ethylene-co-butyl acrylate) with 13 wt% of butyl acrylate (EBA) filled with alumina nanoparticles were studied as a function of particle size, particle coating, filler content (2, 6 or 12wt%) and temperature. The particles were either unmodified or surface-treated with either aminopropyltriethoxy silane or octyltriethoxy silane. The complex permittivity was measured with frequencies varying between 1 mHz and up to 1 kHz at different temperatures (25, 45 and 65°C). Measurements were performed in dry conditions. From the dielectric spectroscopy measurements it can be seen that the tan δ for the dry samples is almost independent of the type of the particle coating used. It does, however, depend on the particle size, filler content and temperature.
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