Fiber Forming Thioacrylamide Polymers from Polyacrylonitriles. Part I. Polymer Conversion

摘要

The cyano moiety of polyacrylonitrile homopolymer and copolymer has been converted to thioamide by the addition of gaseous hydrogen sulfide to solutions of the polymers. In one case, 69% of the cyano moiety was converted to the thioamide. The carbonates of sodium, lithium, and potassium were found to catalyze the addition of hydrogen sulfide by the cyano moiety. The polymer solvent was also found to influence the addition of hydrogen sulfide. In the case of dimethyl sulfoxide, the hydrogen sulfide was reduced without addition unless a catalyst was used. (Author)