Absorption Spectroscopic Studies on the Interactions between Azomethine Dyes and Polyester Model

Abstract

In order to obtain information on the dyeing mechanism of polyester fibers with azomethine dyes, we have investigated interactions between a polyester model and azomethine dyes through UV and visible absorption spectroscopy and application of a modified McRae's equation to the spectral data. Methyl benzoate was used as the polyester model. The orientation force of the azomethine dyes estimated from the equation was about 1 kcal/mol, which was about 5-14% of the total dye-methyl benzoate interaction. The sum of dispersion and induction force of the azomethine dyes estimated from the equation was 6-7 kcal/mol, which was about 85-95% of the total dye-methyl benzoate interaction.