Dielectric Spectrometry of Amorphous Thermoplastic/Glass Bead Composites

抄録

A series of polystyrene/glass bead and poly (styrene-co-methacrylic acid)/glass bead composites with volumic fractions in the order of 21\studied by means of dielectric spectrometry. Experimental isochronal data on the pure matrixes show the α relaxation, associated to the glass transition. In the case of the composites, a more intense relaxation appears at a higher temperature compared with that of the α relaxation. This relaxation is attributed to the Maxwell-Wagner-Sillars (MWS) effect. Experimental results are in agreement with the van Beek theory in the case of untreated spherical inclusions. This agreement is more remarkable in the case of coupling agent-treated glass beads.