Structural and Dielectric Properties of Polyvinyl Alcohol‐TiO2 Doped Thin Films

Abstract Polyvinyl alcohol(PVA)‐titanium dioxide(TiO 2 ) polymer composite films are synthesized by well‐recognized and low cost method of solvent casting. The prepared composite films are characterized by FTIR, XRD, and FESEM. The real electric modulus (M’) spectra show large increment with frequency for 5wt% of TiO 2 as compared to other compositions. The appearance of peaks for each concentration of TiO 2 in M” spectra specifies that strong coupling in the movement of polymer motion and ions. The impedance plots of real impedance (Z’) versus imaginary impedance (Z”) shows semicircles, which diameter and thereby bulk resistance (Rb) is decreased with the loading of TiO 2 . AC conductivity (σ AC ) obeys the universal power law. The prepared PVA/TiO 2 films can be used in a direct methanol fuel cell, and in optoelectronic devices.