Preparation and Characterization of (Pva-Sncl2) Composites

In the present work, the effect of tin chloride SnCl2 addition on some optical properties of poly-vinyl alcohol has been studied. For that purpose , many samples has been prepared by adding SnCl2 to the poly-vinyl alcohol with different weight percentages from SnCl2 with polymer and by different thickness .The absorption and transmission spectra has been recorded in the wavelength range (190-890)nm . The absorption coefficient, refractive index, extinction coefficient and energy gap of the indirect allowed transition have been determined.