The effect of dye on conductivity of Polymer (PVC) observed by spectroscopic studies

The conducting behaviour of Pure and Malachite green mixed Polyvinyl Chloride (PVC) samples prepared using the solution cast method in various ratios, was investigated using Ultraviolet (UV)transmittance, UV absorbance, Infrared (IR) transmittance, and X-ray Diffraction (XRD). The results show that UV transmittance decreases with sensitizer concentration in PVC. UV absorbance shows an increasing trend with the degree of sensitization. The formation of a charge transfer complex in a polymer matrix was inferred from these studies. Reduction in electronic bandgap and hence change in conductive behaviour is reported.