Carrier Dyeing of Polyester Fibre

Abstract

Aspects of the diffusion of carriers in polyester fibre have been studied using several compounds representative of commercial carriers. The apparent diffusion coefficients, activation energies of diffusion, and entropies of activation of diffusion have been determined. The apparent diffusion coefficients were found to be several orders of magnitude greater than those of disperse dyes, whilst the apparent activation energies and entropies of activation of diffusion were lower. A major difference in the diffusion behaviour of carriers, compared with that of disperse dyes, is the concentration–dependence of the diffusion coefficients of the former class of compound.