Phase equilibria in sodium salt of cellulose acetate sulfate-water-alcohol systems and a criterion of the formation of the liquid crystalline state

DD Grinshpan, Svetlana Tret'yakova, NG Tsygankova, SE Makarevich, TA Savitskaya

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Abstract

The solubility and phase state of the sodium salt of cellulose acetate sulfate in water-ethanol, water-isopropanol, water-ethylene glycol, and water-glycerol mixtures were determined over a wide range of component concentrations. Viscometry was used to obtain the hydrodynamic parameters of dilute solutions of various salt forms of cellulose acetate sulfate such as the characteristic viscosity [eta], Huggins constant k(H), and crossover concentration c*. For the first time, an empirical criterion, [eta]k(H)c*, was suggested that could be used to predict the formation of the liquid crystalline state in concentrated solutions of cellulose derivatives.
Original languageEnglish
Pages (from-to)1728-1733
JournalRussian Journal of Physical Chemistry A: Focus on Chemistry
Volume79
Issue number11
Publication statusPublished - Nov 2005

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