الخلاصة:
The films of polymer (polyvinyl alcohol (PVA)) pure and doped
with copper salts with different concentrations (2, 4, 6, 8 and 10) wt%
have been prepared by using casting technique. The optical and thermal
properties of pure and doped films with copper salts of polymer
(polyvinyl alcohol (PVA)) are studied. The transmission and
absorption spectra have been recorded in the wavelength range
(300-1100) nm.
The effect of copper salts concentration on the optical parameters
such as transmittance, absorbance, absorption coefficient, refractive
index, extinction coefficient and real and imaginary parts of dielectric
constant for (PVA-copper salts) films are studied also.
The experimental results for (PVA-copper salts) films show that the
transmittance decreases with increasing the filler content while the
absorbance increases with increasing the filler content. The absorption
coefficient, refractive index, extinction coefficient and real and
imaginary parts of dielectric constant are found to increase with
increasing the filler content. Moreover, the results show that the allowed
indirect transitions energy gap (Eg) decreases with increasing the filler
content.
Abstract
Also the effect of copper salts concentration on the thermal
properties for (PVA- copper salts) films have been investigated.
The experimental results for (PVA-copper salts) films show that the
thermal conductivity decreases with increasing the filler content.
The effect of annealing on the optical properties for (PVA- CuCl)
films with different concentrations (2, 4, 6, 8 and 10) wt% of copper
chloride salt shows that the transmittance decreases after annealing
and the absorbance increases after annealing for all the films. The
absorption coefficient, refractive index, extinction coefficient, real and
imaginary parts of dielectric constant are found to increase after
annealing for all the films. The energy gap (Eg) decreases after
annealing all the films.
