I saw a paper "Wet spinning of poly-m-phenylene isophthalamide fiber. (Part 1). Coagulation phenomena of poly-m-phenylene isophthalamide/N-methylpyrrolidone solution", which is published in Japanese.

Is there anyone know how was PMIA dissolved in NMP? As known, PMIA is very diffcult to be dissolved. Normally DMAc with LiCl is used as solvent for dissolving PMIA, the temperature should be even higher than 80 degree C. Thanks.