A series of PMMA (poly(methyl methacrylate)) and NaI based polymer gel electrolytes were prepared with different concentration of O/Na ratio. Here we have chosen the values of O/Na ratio as O/Na=20, 40, 60, 80 and 100. For the preparation of the samples, we have taken poly(methyl methacrylate)as polymer, Ethylene carbonate + Propylene carbonate as solvent and Sodium iodide as salt. Free standing films of polymer gel electrolytes were prepared using gelation method. Samples were characterized by different experimental technique such as XRD, Optical microscopy, FTIR spectroscopy and Complex impedance spectroscopy. For structural properties of the material, X-ray diffraction technique is used. Optical microscopy is carried out to know the morphological properties. FTIR spectroscopy is carried out to observe the changes in the FTIR band present for different composition of O/Na. Dielectric Spectroscopy is carried out to analyse the dielectric and electrical behaviour of polymer gel electrolyte
