抄録
Bleached cotton was immersed in an aqueous solution of sulfuric or perchloric acid, excess solution was pressed out, air dried to the desired degree and then brought into contact with acetic anhydride vapor at 30_??_60°C for the acetylation. In contrast to the acetylation of rayon various organic liquids such as lower alcohols and esters may be employed instead of water for the pretreatment successfully. Acetylation proceeds smoothly even when the water content of the fiber is as low as 10%. These observations indicate that liquids penetrate easier into cotton fiber than into rayon. But under such conditions that acetylation of both cotton and rayon proceeds smoothly, the acetylation rate of the latter is greater.
