Effect of composition on the dielectric relaxation of zeolite-conducting polyaniline blends

The complex permittivity of conducting polyaniline and zeolite-polyaniline blends was measured in the frequency range of 10(-2)-2x10(6) Hz from room temperature to liquid nitrogen temperature. A loss peak is detected for 25, 35, and 50 wt % zeolite blends. Its position in the frequency domain, activation energy, and intensity is a function of composition. The experimental results are interpreted through the competing multiple role of zeolite: as being less conducting than polyaniline, it impedes the electric charge flow by dividing large conducting polyaniline regions into smaller pieces, subsequently provides short-range pathways, and, moreover, enriches the blend in interfaces separating zeolite from polyaniline.