CAJ | 학술논문

干法腈纶纺丝原液中盐沉淀主要取决于聚合物中 NaHS04浓度、NaKS04浓度、DMF 水解速度和强酸(H2S04)的存在。因此，应特别注意提高水洗的效果，以减少聚合物中 NaHS04含量；严格工艺操作，避免聚合物中残余钾量的增加，尽量使 Na2S04的结晶发生在压滤机前，避免 DMF 中强酸的存在。
간법정륜방사원액중염침정주요취결우취합물중 NaHS04농도、NaKS04농도、DMF 수해속도화강산(H2S04)적존재。인차，응특별주의제고수세적효과，이감소취합물중 NaHS04함량；엄격공예조작，피면취합물중잔여갑량적증가，진량사 Na2S04적결정발생재압려궤전，피면 DMF 중강산적존재。
Salt precipitation of original fluid for dry acrylic spinning depends on concentration of NaHSO4 and concentration of NaKSO4 in polymer, content of H2SO4 and DMF hydrolysis rate. Consequently, water-washing effect should be especially improved in order to reduce concentration of NaHSO4 in polymer. And process operation should be enhanced in order to prevent from increasing of residue potassium quantity in polymer. As far as possible crystallization of Na2SO4 forms before press-filter machine process, existence of H2SO4 in DMF should be avoided.