Journal
EUROPEAN POLYMER JOURNAL
Volume 42, Issue 10, Pages 2672-2677Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2006.05.020
Keywords
poly (N-vinyl pyrrolidone); proton conductor; conductivity analysis; activation energy
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The polymer electrolytes based on poly N-vinyl pyrrolidone (PVP) and ammonium thiocyanate (NH4SCN) with different compositions have been prepared by solution casting technique. The amorphous nature of the polymer electrolytes has been confirmed by XRD analysis. The shift in T-g values and the melting temperatures of the PVP NH4SCN electrolytes shown by DSC thermo-grams indicate an interaction between the polymer and the salt. The dependence of T-g and conductivity upon salt concentration have been discussed. The conductivity analysis shows that the 20 mol% ammonium thiocyanate doped polymer electrolyte exhibit high ionic conductivity and it has been found to be 1.7 x 10(-4) S cm(-1), at room temperature. The conductivity values follow the Arrhenius equation and the activation energy for 20 mol% ammonium thiocyanate doped polymer electrolyte has been found to be 0.52 eV. (c) 2006 Elsevier Ltd. All rights reserved.
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