Abstract
The diffusion behavior of p-aminoazobenzene (Dye I) and 4-N, N-di-hydroxyethyl aminoazobenzene (Dye II) in nylon 6 as sorbed from aqueous and aqueous sodium poly(styrene sulfonate) (PSSNa) solutions was examined. The addition of PSSNa in the dye bath causes a marked decrease in the equilibrium dye concentration on nylon 6. It is found that the proportionality holds between the equilibrium dye concentration, Cs and the free dye concentration in the bath, Cf estimated from the solubility data. This indicates that the dye bound to PSSNa has no affinity to nylon 6. Further, the effect of rotation of the film roll on the equilibrium sorption of Dye I was examined.
