HIGH-TEMPERATURE PRESSURE RHEOLOGY OF CARBOXYMETHYL CELLULOSE (CMC)

Rheological properties of 0.5-2.0% carboxymethyl cellulose (CMC) solutions were evaluated using a computer controlled rotational viscometer under a dynamic upward and downward linear-ramp shearing sequence. Experiments were performed in the temperature range 60-140 degrees C using a high temperature/high pressure sensor system. Rheological parameters were evaluated using different models (power law, Herschel-Bulkley, Casson and linear), while the temperature and time dependency of these parameters were evaluated using Turian and Weltmann models, respectively. All theological properties were significantly (p < 0.01)influenced by both temperature and concentration.