Abstract
The composites materials are important in many applications and industries. For the importance of
these materials, this paper is aimed to study optical properties of sodium fluoride polyvinyl pyrrolidone
(PVP-NaF) composites. The effect of sodium fluoride on optical properties of polyvinyl pyrrolidone
has been investigated. The samples of (PVP-NaF) composites are prepared by using casting technique.
The optical properties of (PVP-NaF) composites were measured in the wavelength range (200-800) nm.
Results showed that the absorbance, absorption coefficient, extinction coefficient, refractive index and
real and imaginary dielectric constants of polyvinyl pyrrolidone are increase with increasing the
sodium fluoride concentrations. The energy band gap of polymer is decrease with increasing the
sodium fluoride concentrations.
Keywords: sodium fluoride, polyvinyl pyrrolidone, optical properties, polymer.