Generalization of a Double-Point Method to Determine the Intrinsic Viscosity in a Polymer-Solvent Mixture

Abstract

A double-point method proposed in literature for the determination of the Intrinsic Viscosity of a polymer-solvent solution and based on the Ram-Moham-Rao single point equation, have been extended to all single-point expressions available in literature. To assess the validity of the method, Intrinsic Viscosity values of several rubber-solvent mixtures, calculated following the classical procedure of looking for the common intercept of Huggins and Kraemer plots, have been compared with the ones calculated by means of the double-point methods. The deviations between the results obtained by both methodologies allows assuring that double-point equations are a reliable alternative of Huggins and Kraemer plots to determine Intrinsic Viscosity values.