AbstractViscosity measurements were made for dilute solutions of three grades of cellulose acetate (acetyl content 39.8, molecular weight M̄v30270 to 46250) in acetone in the temperaturetrange of 10° to 35°C. The data satisfied the Mark‐Houwink equation, η =KM̄ vα, where η = limiting viscosity number andKand α are Mark‐Houwink constants. The values of η and α decreased with increase in temperature, and straight‐line correlations were obtained for −dη/dtversus M̄vand log η versus 1/T(absolute temperature). The results are discussed in terms of solution properties of cellulose acetate in acetone and their possible relevance to reverse os
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