Viscometric average degree determination

Hence, the viscosity of the solution of high-molecular weight polymers substantially decreases on addition of the oligomer salt and the viscometrically determined average degree of association, N, should allow a reliable determination of the equilibrium constant, K, of the athermal mixing process. 

The degree of polymerization (DP) of cellulose (i.e., the number of anhydroglucose units per chain) varies widely (Table 2) and depends on the source of the cellulose, the extent of cell development within that source, and the meAods used for isolation of the cellulose. Cellulose is poly disperse the DPs reported in Table 2 are weight-average degrees of polymerization (DP J that were determined by viscometric methods (assumes DP , - DP J. 

Number-average molecular weights (M ) were measured after various times of water immersion in order to check whether or not the water equilibration procedures Induced a significant degree of hydrolysis. Thus values of were determined viscometrically using solutions in formic acid and the following equation (18) ... 

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