Polyacrylonitrile filaments spun from dmf solution and

摘要

Filaments, having a high resistance to rupture, are made from homo- or co-polymers of acrylonitrile by spinning polymer solutions in dimethylformamide into precipitating baths of water or mixtures of water and dimethylformamide containing acid (I) to get a pH of 1-4 followed by drawing of the fibres. (I) is oxalic acid, hydrochloric acid.