Optical and electrical properties of polyvinyl-chloride (PVC)‎ films

الملخص EN

The optical properties of the polyvinyl-chloride thin films were studied which include their absorbance, transmittance, reflectance spectra, band gap, and refractive index, before and after annealing at T = 75οC for 24 hours.

The films were found to exhibit high transmittance, low absorbance and low reflectance in the visible, and near infrared region up to 1100 nm.

However, the absorbance of the films was found to be high in the ultra violet region with peak around 306nm.

The dielectric constant ε′, dielectric loss ε″, and ac conductivity of polyvinyl-chloride were obtained at different frequencies and temperatures.

The experimental results show that ε′ and ε″ decreased with increasing frequency, which indicates that the major contribution to the polarization comes from orientation polarization.

The value of ε′ increased with increasing temperature, which is due to great freedom of movement of the dipole molecular chains at high temperature.