Enhancement Mechanical Properties of Polyvinly Alcohol by adding Methyl Cellulose using ultrasonic technique

Some of physical properties of polyvinyl alcohol dissolves in distilled water had been studied at different concentrations (0.1%, 0.2%, 0.3%, 0.4%, 0.5% , 0.6%, 0.7%, 0.8%) gm./ml) before and after adding (1and 2 ) gm of MC for all concentrations , the mechanical properties such as ultrasonic velocity had been measured by ultrasonic waves system at frequency 25 KHz, other mechanical properties had been calculated such as absorption coefficient of ultrasonic waves, relaxation time, relaxation amplitude, specific acoustic impedance, compressibility and bulk modules. The results show that all these properties are increasing with the increase of the polymer concentration except compressibility is decreasing with increase the concentration; results show that when adding MC these properties are increasing except compressibility is decreasing. Results also shows that adding MC polymer to PVA enhances these properties as a result of high values after addition. Keywords : PVA solution, MC solution, mechanical properties, ultrasound technique.