Enhancement Mechanical Properties of Carboxymethyle Cellulose by Adding Polyacrylamide using Ultrasonic Technique

Abstract

The CMC/PAAM composite membranes were prepared by casting method, the appropriate weight of CMC was variable (0.2,0.3,0.4,0.5 and 0.6 gm) and dissolved in (25ml) of distilled water under stirring and heat (70?C) for (40 min.) then add the PAAM with different weights (0.05, 0.1  gm) for each CMC weight. In order to evaluate the mechanical properties of CMC/PAAM composite the ultrasonic measurements were performed at the samples , these properties are ultrasonic velocity, compressibility, acoustic impedance and bulk modulus, were made at fixed frequency (f =25 KHz), another acoustic mechanical properties were measured and calculated at a same time such as the ultrasonic wave amplitude absorption by composite were measured using oscilloscope ,then we calculated absorption coefficient and the transmittance ratio of the sound. It was found that there is significant relationship between ultrasonic velocity and material properties also results show that adding PAAM effects on the density then on the absorption of the ultrasonic waves inside the composites samples.

Keywords: Carboxymethyle cellulose, Polyacrylamide , Mechanical properties, ultrasound technique.