Rheological study of solutions of high concentrations of Carboxymethyl cellulose

The purpose for this thesis is to provide a complete and comprehensive theological study for a high range of CMC concentrations. The objective is to reveal the measurements of steady-state parameters, transient shear stress response, and yield stress of Carboxymethyl Cellulose. Also, the thixotropic, viscoelastic behavior, and some of the dynamic responses were included. In order to accomplish this, a Haake-Rheostress 100, Cone-and-Plate Rheometer system was used to get a full set of rheological characteristics of high concentrations of carboxymethyl cellulose solutions (CMC). The concentrations ranged by weight from 5% to 8% of CMC. The rheological behavior of CMC gels at concentrations of 5, 6, 7, and 8% by weight has been analyzed. This range was wide enough to cover the rheological properties of the highly concentrated CMC solutions. The thixotropic areas and its variations with factors such as concentration and agitation time were obtained. The rheological fingerprints of the samples provided the assigned shear rate and the resulting shear stress correlation in the controlled rate mode of the rheometer.