PVA/ZnO and PVA/TiO2 composite membranes were prepared by a sol-gel casting
method. In order to evaluate some physical properties of PVA/TiO2 and PVA/ZnO
composites the ultrasonic measurements were performed for the samples at room
temperature (298.15 K.) with frequency (40 KHz), these properties are ultrasonic velocity,
compressibility, bulk modulus, absorption coefficient, relaxation amplitude and
transmittance, relaxation time and viscosity. It was found that there is significant
relationship between ultrasonic velocity and material properties also results show that
adding ZnO and TiO2 effect on densities which were responsible for the ultrasonic wave’s
absorption inside the composites which effected also on the transmittance and reduce
velocity.