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Pristine and doped films of polyvinyl alcohol (PVA): poly (methacrylic acid-ethyl acrylate)(MAA-EA) (50:50) blend with various weight percentages (5, 10 and 15 wt%) of sodium chloride (NaCl) (Na +  ions) were prepared by a simple solution casting method. Exhibiting a decrease in diffraction peak intensities with increasing weight percentage of NaCl salt content, X-ray diffraction (XRD) indicated a decrease in crystallinity or less polymer blend. Thermogravimetric analysis (TGA) showed a decreasing trend in melting temperature of the doped films compared with the pure films. From the optical absorption and conductivity studies, among the prepared samples, the film with 15 wt% NaCl showed minimum absorption edge, direct band gap and indirect band gap values of 4.02, 4.52, 3.54 eV, respectively, and the maximum ionic conductivity of 9.85 × 10 −8  S/cm.

journal of macromolecular science, part b

Doping Na +  into Polyvinyl Alcohol: Methacrylic Acid-Ethyl Acrylate (PVA/MAA:EA) Polymer Blend Electrolytes; A Way to Improve the Blend’s Thermal, Structural, Optical and Electrical Properties