FEATURES OF COMPLEXING AND THE SOLUTION STRUCTURE FROM THE DATA ON ROTATIONAL AND TRANSLATIONAL MOBILITY OF MOLECULAR PROBES IN CELLULOSE-ACETATE SOLUTIONS

C-13 NMR relation and self-diffusion measurements of the molecular probes added to dimethyl sulfoxide-cellulose acetate solutions have been carried out as a function of concentration and degree of substitution of the polymers. The probes differ in their capacity for complexing with the hydroxyl groups of the cellulose acetate. Spin-lattice relaxation rates and self-diffusion coefficients of the hydrogen-bonding probes vary with the hydroxyl group content of the polymer, and the diffusion coefficients of the inert probes are shown to be sensitive to the difference in the supermolecular organization of the solutions. The analysis of molecular probe hydrogen bonding with the polymers allows us to obtain information on the OH groups' binding capacity and their accessibility at high polymer concentrations. The relaxation rates of bound species under the varied conditions are calculated.