I. Vinylation of Cotton Slivers and Print Cloth

Abstract

Cotton cellulose in the form of slivers and print cloth was successfully vinylated with acetylene without destroying the fiber structure. D.S. (degree of substitution) values up to 0.70 were achieved in vinylation reactions at 120° C, using potassium hydroxide as the catalyst. The important variables in the vinylation reaction were found to be the catalyst and its concentration, the moisture content of the catalyst-impregnated cotton, solvent, acetylene pressure, time, and temperature. The weight of vinylated cotton re covered was 95% to 100% of the weight of the cotton used in the case of the best vinylation conditions, and the vinylated cotton showed good storage stability.

Reactions of Acetylene Under Pressure

“…Recently, the vinylation of cotton cellulose in fiber form without destroying the fiber structure was reported. 13 Cotton slivers and print cloth were successfully vinylated at 120OC using potassium hydroxide as the catalyst, with degree of substitution (D.S.) values up to 0.70 A.D.S.…”