Absorption Spectroscopic Studies on the Interactions between Azomethine Dyes and Poly (ethylene terephthalate) Film

In order to obtain information on the dyeing mechanism of polyester fibers with azomethine dyes, we have investigated the interactions between a poly (ethylene terephthalate) film (PET) and azomethine dyes by the analysis of UV and visible absorption spectra in applying a modified McRae' s equation. The orientation force of the azomethine dyes estimated from the equation was about 0.1-0. 2kcal/mol, which was about 1 - 2 % of the total dye-PET interaction. The sum of dispersion and induction force of the azomethine dyes estimated from the equation was 7-14kcal/mol, which was about 98-99% of the total dye-PET interaction.