Abstract

A biodegradable solid polymer blend films of PVA (50)/ PVP (50) filled with Yb(NO3)2 were prepared by solution casting technique. The degree of amorphosity of the polymer blend composites was increased by the incorporation of filler into the polymer blend matrix. The decrease in the optical energy gap values was observed with the addition of filler which is illustrated by UV-Vis studies, indicating the interaction of filler with polymer blend matrix. With the temperature increase, the value of dielectric constant was found to increase depicting the more polar nature of polymer matrix. The tangent loss spectra of the samples showed a broad peak which confirms the presence of relaxing dipoles in the polymer composites.