LIQUID PHASE FIBROUS ACETYLATION OF CELLULOSE

Cotton yarn was acetylated in fibrous form using perchloric acid catalyst in liquid phase. Under appropriate conditions acetylation takes place smoothly and highly acetylated fibers may be obtained easily. In this case a wider range of imbibition liquid may be employed than by the acetylation with sulfuric acid. In contrast to acetvlation with sulfuric acid catalyst cotton is more easily acetylated under the same conditions than rayon. It is noteworthy that perchloric acid acetylation bath decomposes gradually, wheras sulfoacetic acid bath remains stable.