Study the Effect of adding PVA on Some Physical Properties of CMC Polymer as aqueous solutions

Abstract

Some of physical properties of Carboxy methyl cellulose dissolves in distilled water had been studied at different concentrations (0.1%, 0.2%, 0.3%, 0.4% ,0.5 ,%,0.6 %,0.7% and 0.8%) gm./ml) before and after adding (0.5, 1 ,1.5 ) gm. of PVA for all concentrations, the Rheological properties such as shear, relative reduced and Specific Viscosity are measured; the mechanical properties such as ultrasonic velocity had been measured by ultrasonic waves system at frequency 45 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 PVA these properties are increasing except viscosity, Relaxation time and compressibility are decreasing. Results also shows that adding PVA polymer to CMC enhances the ultrasonic absorption coefficient as a result of high values after addition.

Keywords: CMC solution, PVA solution, mechanical properties, rheological properties, ultrasound technique.