| 摘要 |
PURPOSE: A method for preparing an aromatic polyamide polymer, an aramid fiber, and a method for preparing the aramid fiber are provided to obtain an aromatic polyamide polymer with L-value of 60 or more using a polymerization solvent with permeability more than 70%. CONSTITUTION: A method for preparing an aromatic polyamide polymer comprises the steps of: preparing a polymerization solvent; preparing a mixed solution by dissolving an aromatic diamine in the polymerization solvent; and polymerizing the aromatic diamine and aromatic diacid halide by adding aromatic diacid halide to the mixed solution. The polymerization solvent has permeability more than 70%. |
