Temperature Effect in Some Mechanical and Rheological Properties for Poly (Hydroxyethyl cellulose) high viscosity

Abstract

Some of mechanical and rheological properties of poly Hydroxyethyl cellulose dissolves in distilled water for different concentration from (0.1%) to (0.8%)gm/ml concentrations in temperature (20oC , 30oC 40oC , 50oC) had been studied. With respect to the mechanical properties, the ultrasonic velocity had been measured by ultrasonic waves system of frequency (26 KHz), other properties had been calculated such as: absorption coefficient of ultrasonic wave, relaxation time, compressibility, relaxation time, bulk modulus, relaxation amplitude and specific acoustic impedance. All these measurements were carried at different temperature (20oC 30oC 40 oC , 50oC).These properties are rheological properties such as: shear viscosity and its different Kinds, Viscosity average molecular weight, effective molecular radius and density where the viscosity was measured by using Ostwald viscometer.The results show that properties have exponential or linear increment with the increase of concentration except compressibility decreasing with the increase of the concentration at different temperature.