Rheology of concentrated N-methylmorpholine-N-oxide cellulose solutions

Rheological characteristics of cellulose solutions in N-methylmorpholine-N-oxide were studied at 90-120°C in a wide range of compositions. The viscosity of solutions with concentrations c 0.18 wt fractions showed a considerable increase in the degree of structurization, which led to an anomalous increase in the relaxation times, the values of viscosity, the activation energy for the viscous flow, and the elastic moduli.