Effect of Temperature and Acid Molarity on the A.C Conductivity and Dielectric Properties of the Conductive Polymer
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Abstract
The study included preparing pure polyaniline (PANI) and treating it with sulfuric acid at various strengths while keeping the temperature at 27ºC. The morphology of the polymerization products was examined using a scanning electron microscope (SEM). The SEM images revealed a notable effect of how much acid is present on the formation of PANI. The investigation focused on the relationship of alternating electrical conductivity with temperature and frequency. The A.C. electrical conductivity was represented by the variable (s) and varied with frequency, which ranged from 1 kHz to 10 MHz. The value of s was found to be less than 1, and it decreased as the temperature increased. This observation implies a dominant hopping mechanism. The activation energy was measured within the temperature range of 303-423 K at a frequency of 10 kHz; the measured values ranged from 0.249 to 0.12 eV. The relative dielectric for PANI and the constant loss were determined. The data collected indicated that the actual dielectric constant exhibits a decrease with both frequency and temperature.
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© 2023 The Author(s). Published by College of Science, University of Baghdad. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License.
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