Optical, Thermal Properties of Cadmium Chloride Reinforced PVA:PVP Blend Films

Abstract

In this study, pure polymer blend film (PVA:PVP) and salt (CdCl 2 .H 2 O) reinforced polymer blend films were prepared at different weight ratios (10, 20, 30) wt% using the casting method. The optical and thermal properties of all polymer blend films were studied.The transmittance and absorbance spectra were recorded within the wavelength range (190-1100) nm. The effect of salt weight ratio on the energy gap of salt (CdCl 2 .H 2 O) reinforced polymer blend films (PVA:PVP) was studied, and it was found that the energy gap decreases as the salt (CdCl 2 .H 2 O) weight ratio increases. The results showed that electronic transitions are indirect. The effect of salt weight ratio on the thermal properties of the polymer blend films (PVA:PVP) reinforced by (CdCl 2 .H 2 O) salt of the polymer blend based reinforced by (CdCl 2 .H 2 O) salt were also studied. The experimental results showed that the thermal conductivity coefficient of the polymer blend films (PVA:PVP) reinforced by (CdCl 2 .H 2 O) salt increases and then decreases irregularly as the weight ratio of the salt (CdCl 2 .H 2 O) increases, and it is found that the thermal conductivity coefficient polymer blend is very small for all weight ratios and therefore they can be used as a heat-insulation shields. The value of the glass transition temperature, crystal melting point and crystallinity of the polymer blend films (PVA:PVP) reinforced by (CdCl 2 .H 2 O) salt vary with the increase in salt (CdCl 2 .H 2 O) weight ratios, noting the disappearance of crystallization for the pure (PVA:PVP) polymer blend film, reinforced polymer blend films at certain weight ratios of the salt (CdCl 2 .H 2 O).