| 摘要 |
The present invention relates to manufacture of copolymerized aramid fiber. Graphene, graphene oxide, or a mixture thereof is added to an organic solvent. Then, aromatic diamine is injected and dissolution is performed so that an organic solvent in which the aromatic diamine is dissolved is produced. Terephthaloyl dichloride addition and reaction are performed in the organic solvent in which the aromatic diamine is dissolved so that a polymer solution containing an aramid copolymer is produced. The copolymerized aramid fiber is produced by spinning, coagulation, and heat treatment being performed for the polymer solution. Since the graphene that is highly compatible with the aramid copolymer and has crystallinity is added before the injection and dissolution of the aromatic diamine in the organic solvent, rapid increase in polymer solution viscosity can be prevented. The graphene can be dispersed well in the organic solvent, and dispersibility is improved based on interaction between the graphene and the aramid copolymer during an aramid copolymer polymerization process, and thus agglomeration over time can be effectively prevented. Hence, the copolymerized aramid fiber manufactured by the method has significantly improved strength with fiber defect minimized. Furthermore, spinning can be improved since the graphene injected into the organic solvent affects the crystallinity of the aramid copolymer and reduces the elasticity of the polymer solution. |
