Mustansiriyah Journal of Pure and Applied Sciences

Study the optical properties and FTIR spectroscopy of polyvinyl alcohol doped by potassium permanganate films

H.H. Mohammed and T.J. Alwan

Keywords: Polyvinyl alcohol, potassium permanganate, casting method.

Abstract

The casting method was used to prepared pure polyvinyl alcohol PVA and doped by potassium permanganate (PVA/KMnO₄) films, with different weight ratios (2, 4, 6, 8) Wt% of potassium permanganate in order to investigate the impact of potassium permanganate on the optical properties and FTIR spectroscopy of the prepared films. Infrared spectra in the wavenumber range (600-2000) cm^-1 used to study the effect of doped on the functional groups of polyvinyl alcohol. UV-VIS spectroscopy was used to study the optical properties for the samples and based on these spectra, the optical energy gap was calculated, which was in the range 3.2 eV for the pure films and decreases with increasing the doping ratio of potassium permanganate to be 2.62 eV. The absorption coefficient, extinction coefficient, refractive index, the dielectric constant and optical conductivity were also studied under the influence of doping ratios.