Abstract
Nylon 6 (Ny 6) monofilaments with various draw ratios were dyed in saturated aqueous solution of 1, 4, 5, 8-tetraaminoanthraquinone (4AAQ) at 90°C under various hydrostatic pressures up to 2.5 kbar. Diffusion coefficient (D) of 4AAQ in Ny 6 and activation volume for the diffusion (ΔV_??_), both along the parallel (_??_) and perpendicular (⊥) directions to the drawing axis, were obtained from the dye penetration distance vs. square root of diffusion time relationship and the pressure dependence of D. It was found that D_??_ decreases rapidly with increasing draw ratio, while D⊥ shows a maximum near draw ratio of 1.9 and then decreases rapidly. In the course of drawing, D⊥, persists in being larger than D_??_. In a striking contrast, however, for ΔV_??_, neither a significant change nor anisotropy for the two directions was obtained with increasing draw ratio. The reason for such an insensitive behavior of ΔV_??_ to the drawing was discussed.
