Gradient dependence of viscosity of cellulose tricarbanilate in tetrahydrofuran

The dependence of viscosity of cellulose tricarbanilate in tetrahydrofuran on the velocity gradient D <2500 s−1 for molecular weights up to 1.2×106 was determined, and an empirical equation for the determination of the limiting viscosity number for zero velocity gradient was derived. Errors involved in the viscosity determination from a single concentration using an approximate formula were also ascertained.