N-arylmaleimide based monomeric and polymeric dyes for cellulose triacetate fiber

Abstract

A series of monomeric dyes has been prepared by diazotization of 2,6-dibromo-4-nitroaniline and coupled with various N-arylmaleimides. The monomeric dyes were characterized by elemental analysis and IR spectra. The polymeric dyes have been prepared by free radical polymerization of monomeric dyes. They were characterized by IR spectral studies, intrinsic viscosity, molecular weight by vapor pressure osmometry, thermogravimetry analysis and elemental analysis. The purity of all the dyes were checked by thin layer chromatography and they have also been applied on cellulose triacetate fiber as a disperse dye. All the dyes were found to give various color hues with good to very good depth and levelness on the fiber. The percentage dye bath exhaustion and fixation on fiber have been found to be good to very good. The monomeric dyes showed very good fastness properties, and their corresponding polymeric dyes showed excellent fastness to light, washing, perspiration, solvent resistance and sublimation.