Abstract
Nano-composite polymer electrolyte membranes were synthesized by the grafting of a vinyl based base molecule unto a fluorinated polymer backbone, namely poly(vinylidene fluoride). Polymer acid-base blends were synthesized using dicarboxylic acid based acid polymer with the grafted polymer. The properties of the membranes have been found to improve with the addition of acid polymer into the blend and could be due to the acid base interactions taking place between the polymers. Ternary system membranes has also been developed containing the graft polymer, triflic acid and poly(ethylene-co-acrylic acid) using in-situ approach. Ionic conductivity of 10-3 S/cm and higher has been observed for these systems. Nano-composite blend and ternary system membranes have also been developed by addition of nano-tubular titanium dioxide. The synthesized membranes have been studied for their morphological, electrical, thermal and mechanical properties. High conductivities, good morphological structure and thermal stabilities were observed for blend membranes as well as for nanocomposite ternary system membranes.
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