抄録
Bleached sulfite pulp was dissolved with formaldehyde in dimethyl sulfoxide, and homogeneous butyration of the cellulose by n-butyric anhydride in the presence of pyridine was examined. Cellulose butyrates with a degree of substitution up to 1.8 were obtained in recovery yield ca. 90%, and were found to be more soluble in various organic solvents than the cellulose acetates with a degree of substitution of 2.0-2.4, prepared with a similar method. The cellulose butyrate film prepared from its acetone solution was colorless and transparent, and not so hard as the cellulose acetate film, and had rather lower tensile strength. The infrared spectrum of the cellulose butyrate was also investigated.
