Abstract

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A series of azo dyes was synthesised by coupling reaction of napththalen-2-ol with diazotized 4- sodiumphenolate, 4-Nitrophenylazo and 4-Chlorophenylazo respectively, as diazo components. The characterization of the dyes was carried out by GC/MS analysis. The solubility of dyes in the visible absorption spectra was also determined. The dyeing performances of the three dyes were assessed on cotton, wool and nylon fabrics, also determined are the molar absorbtivity, dyebath exhaustion (%E) and dye fixation (%F). The dyed fabrics show very good washing fastness properties for wool and nylon and moderate for the cotton fabric. These dyes were found to give bright yellow to purple colour shades with very good depth and levelness on the fabrics. The dyebath exhaustion and fixation on the various fabrics were also found to be very good

Keywords: Diazotization, coupling, dyeing, exhaustion, fixation, fastness