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

TL;DR

This study investigates how varying zeolite content affects the dielectric relaxation properties of zeolite-polyaniline blends across a wide frequency and temperature range, revealing composition-dependent relaxation phenomena.

Contribution

It provides new insights into the impact of zeolite composition on dielectric relaxation behavior in conducting polymer blends, with detailed analysis of loss peaks and activation energies.

Findings

Loss peaks depend on zeolite content and frequency.

Zeolite impedes charge flow and creates interfaces affecting relaxation.

Relaxation characteristics vary with composition and temperature.

Abstract

The complex permittivity of conducting polyaniline and zeolite - polyaniline blends was measured in the frequency range 0.01 to 2000000 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.