Viscosity‐molecular weight relationship for cellulose acetate in acetone

Abstract

Abstract Careful viscosity and osmotic pressure measurements with a membrane of known reliability are reported for 14 fractions of cellulose acetate prepared by repeated refractionation, For molecular weights up to 115,000 the following relation is obtained between intrinsic viscosity and absolute molecular weight: the units of [η] being 100ml./g. An explanation is offered for the difference between this equation and other equations in the literature as well as for the discrepancies among the various literature equations.