Abstract
Complex dielectric permittivity, alternating current electrical conductivity, electric modulus and impedance spectra of propylene carbonate were investigated in the frequency range from 20Hz to 1MHz and temperatures from 278K to 328K. The values of static permittivity, Kirkwood correlation factor, ionic conductivity, electric double layers and conductivity relaxation times, and the conductivity and relaxation activation energies of the propylene carbonate were determined. The effects of ionic impurities on electrical conduction and low frequency relaxation processes in propylene carbonate were explored. It was found that the conductivity behaviour of ionic contaminants in neat liquid propylene carbonate fulfilled the Stokes-Einstein-Nernst relation for the ions movement in viscous media. These results confirm great significance in interpretation of ion-conduction mechanism in liquid and solid polymer electrolytes when propylene carbonate is used as solvent and plasticizer, respectively.
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