Solid polymer blend electrolyte systems have been prepared with Poly (ethylene oxide) (PEO), Poly (Vinylidene fluoride) (PVDF) and complexed with Sodium Nitrate (NaNO 3 ) salt by using solution cast technique. The complexion of salt with polymer blend has been confirmed by X-Ray diffraction, Fourier Transmission Infrared Spectroscopy and scanning electron microscopic studies. AC and DC conductivity studies of these polymer blends were carried out by changing the weight percentages of PEO and PVDF with a constant weight percentage of NaNO 3 . The electric modulus (M ' ) and the dielectric properties for all the polymer blend systems have been investigated with impedance spectroscopic analysis as a function of frequency ranging from 100-30MHz. The ionic conductivity of the blend polymer electrolyte systems followed Arrhenius behaviour and the maximum ionic conductivity was observed for PEO:PVdF:NaNO 3 (80:20:5) at room temperature which is attributed to the formation of the amorphous phase.

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PMMA-Poly Methyl Methacrylate, PVdF-Poly Vinylidene Fluoride and Silver Nitrate (AgNO 3) based blend polymer electrolytes have been prepared by solution cast method. DMF (Dimethyl Farmamide) was used as a common solvent. These systems have been characterized by Scanning Electron Microscopy, Fourier Transform IR Spectroscopy and X-ray Diffraction for various ratios of prepared solid polymer electrolytes. DC ion conductivity has been studied for prepared electrolyte systems and the ionic conductivity of these systems showed Arrhenius behavior. It has been found that the electrolyte membrane's ionic conductivity rises with temperature. AC conductivity, electric modulus and dielectric studies have been investigated. The enhancement of conductivity was observed to be maximum for PMMA(70%):PVdF(30%):AgNO 3 (5%) (9.13 × 10-6 S/cm) and is attributed to decrease in crystallinity.

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