Abstract
The relation between the fine structure in dry-heat-treated, aqueous-heat-treated or phenoltreated 6 nylon fibres, and the diffusion velocity of dyes in the fibres are investigated.
As the fine structure in connection with the dyeability of the fibre, the length of chain molecule in the amorphous region are chosen.
As the scale of the length of chain molecule, qma is used.
qma=(QVw/ava)+1
Q: degree of swelling a: amorphous ratio Vw: specific volume of water Va: specific volume of amorphous region
As the value of a, the weight fraction of the region of the smallest ΔFui* value in the lateralorder distribution in the fibre is used(qmaL).
The qmaL of various 6 nylon fibres (treated in various condition), the diffusion coefficients and the activation energies of diffusion of dispersed dyes in fibres are observed.
It is elucidated that, the larger qmaL value is, the larger the diffusion coefficient and the smaller the activation energy become. And the relation between the fine structures in dry-heat-treated, aqueous-heat-treated or phenol-treated 6 nylon fibres, and the dyeability of the fibres are explained coherently. *Reference. This journal, 18, 784 (1962)
