Abstract
The interactions of a disperse dye with a series of polymeric surfactants of water soluble polyester structure have been studied by a spectrophotometric method. A type of 1:1 complex formation has been found in the interaction systems of disperse dye and water soluble polyester surfactants. The interactions have been shown to be hydrophobic in nature with the extent of interaction increasing with the increasing hydrophobicity of water soluble polyester surfactants.