METHOD OF MANUFACTURING ARAMID COPOLYMER AND COPOLYMERIZED ARAMID FIBER

摘要

In a process of manufacturing an aramid polymer by adding aromatic diacid halide to an organic solvent in which aromatic diamine is dissolved in the same molar amount as the aromatic diamine, an aramid copolymer of the present invention is manufactured by adding 80-99.5 wt% of terephthaloyl dichloride and 0.5-20 wt% of adipic dichloride as the aromatic diacid halide to the organic solvent with respect to the total weight of the aromatic diacid halide, followed by performing copolymerization. p-phenylenediamine or cyano-p-phenylenediamine can be independently used as the aromatic diamine, or p-phenylenediamine and cyano-p-phenylenediamine can be used together as the aromatic diamine. The aramid copolymer manufactured according to the present invention easily allows crystallization and orientation, thereby enhancing the solubility of the copolymer in a spinning dope in a manufacturing process of aramid fiber and expressing high elongation without decrease in strength. Therefore, a copolymerized aramid fiber manufactured from the aramid copolymer of the present invention is particularly useful as a material for rubber reinforcement.