Influence of manganese chloride filler on optical and structural properties of PVA/PVP films

Author(s): E.M.Abdelrazek, A.M.Abdelghany, A.A.Aldhabi

Films of Poly (vinyl alcohol) (PVA)/ Poly (vinyl pyrrolidone) (PVP) polyblend filled of MnCl2 were prepared by using the casting technique. The amorphous feature of the filled polymer was depicted using XRD. The area under the peak and peak intensity was found to decreases with increasing MnCl2 concentration due to the interaction between the polymer blend and MnCl2; this indicates decreasing in the degree of crystallinity in the polymericmatrix. Fourier transforminfrared spectroscopy display significant structural changes within the polymeric matrix indicating a complexation between the pristine polymer and the filler. UV-Vis. optical absorption spectrum indicates a variation in both intensity and optical energy gap with different amount of filler. Both values of direct and indirect energy gaps are calculated and discussed. Obtained data shows a defect formation which increases filler content and supported by both XRD and UV-Vis. Data. Scanning electron microscopy (SEM) shows a homogenous distribution of the filler within the polymeric matrix and in the filled films with different concentrations ofMnCl2 appear a large granules and granule groups randomly distribution on the surface this indicates that these granules may be are ofMnCl2.

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