“…It is feasible to decrease the dope viscosity by increasing the comonomer concentration, but percentage conversion of AN in the polymerization reaction always decreases with the increase in the comonomer content. 1 The effects of inorganic salts on viscosity of AN copolymer solutions have been observed and reported in the literature, 2,3 and addition of LiCl may decrease the viscosity of AN copolymer solutions. 4 To our knowledge, there are only a few reports on effects of inorganic salt ions, that is, Na , on AN copolymer solutions, but there is no report on Nvinylpyrrolidone(N-VP) as comonomer.…”