Diffusion, sedimentation and flow birefringence in solutions of monosubstituted carboxymethylcellulose in cadoxene

• Published in: Polymer science USSR 1987, Vol.29 (1), p.35-43
• Main Authors: Filipp, B., Lavrenko, P.N., Okatova, O.V., Filippova, T.V., Mikryukova, O.I., Petrov, V.R., Dautzenberg, H., Shtennikova, I.N., Tsvetkov, V.N.
• Format: Article
• Language: English
• ISSN: 0032-3950; 1878-268X
• DOI: 10.1016/0032-3950(87)90077-3

The hydrodynamic and dynamo-optical properties of carboxymethylcellulose with M = (39 − 370) × 10 3 and degree of substitution 0·9 ± 0·1 in cadoxene and cadoxene plus H 2O (1:1) have been investigated. Equations are obtained relating the characteristic viscosity and the sedimentation and diffusion coefficients to the molecular mass. Enlisting the theories of the hydrodynamic properties of worm-like chains for carboxymethylcellulose in cadoxene the authors calculate the length of the Kuhn segment A = 130 ± 20 A ̊ which proved to be close to the A value for cellulose. For solutions in cadoxene with water the magnitude A is 1·5−2 times higher. The optical shear coefficient and the optical anisotropy of the statistical segment of carboxymethylcellulose are close to the corresponding values for the cellulose chain in the same solvent.