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Viscosity of aqueous solutions of polysaccharides and their carboxylate derivatives

✍ Scribed by Hiroyasu Nomura; Shinobu Koda; Futoshi Hattori

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
420 KB
Volume
41
Category
Article
ISSN
0021-8995

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✦ Synopsis

The viscosities of aqueous solutions of methyl cellulose, dextran, and their carboxymethyl derivatives were measured as functions of molecular weight and concentration. Furthermore, effects of ionic group and added salt on the viscosity of aqueous solutions of carboxymethyl derivatives were investigated. The viscosities of dextran and carboxymethyl dextran solutions did not show any shear stress dependence, but those of methyl and carboxymethyl cellulose solutions strongly depended on shear stress even a t low concentrations. The results were discussed on the basis of the points of molecular structure and hydration and ionic interaction of a polymer chain in solutions.

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