Dielectric and AC Conductivity of Rockwool Fibers-Polystyrene Composites

The dielectric and AC conductivity of rockwool fibers-polystyrene composites were studied as a function of frequency, temperature, and rockwool concentration through impedance measurements. It was observed that the AC conductivity and the dielectric constant are increased by increasing the rockwool content in the composite. The observed electrical results fit approximately the reported empirical equations concerning the AC conductivity and dielectric behavior of polymer composites. The dielectric behavior of the prepared composites is mainly attributed to the dielectric properties of the rockwool filler. The dielectric results were explained on the basis of the interfacial (space charge) and dipolar polarizations.