Abstract
Thermodynamic properties of acetone solutions of cellulose diacetate (a degree of substitution, DS=2.46) were examined by means of solution stability experiments over the wide range of temperature. The solutions were separated into two-phase at elevated temperatures of around 170°C, the lower critical solution temperature having been determined. On the other hand, no phase separation was observed at low temperatures. The latter observation is not in accord with a published result on similar materials. A theoretical consideration is given to substantiate the observed phenomenon.
