Facile synthesis and dyeing performance of some disperse monomeric and polymeric dyes on nylon and polyester fabrics

ABSTRACT. Monoazo disperse polymeric dyes consisting of polyarylazocarboxybenzene-formaldehyde (PACB-F) and polyarylazohydroxynaphthalene-formaldehyde (PAHN-F) were synthesized through diazotisation, coupling polycondensation reactions in the presence formaldehyde aqueous oxalic acid. The structure as synthesised was acquired using UV-visible absorption maxima FT-IR spectroscopy their color, yield, melting point, solubility, viscosity determined via standard methods. FTIR results showed successful formation due to shift wavelength maximum (?max) (420-470 nm, 460-510 nm) new peak at around (2800-2995 cm-1) for methylene bridge, respectively. yield monomeric 67.1-85.7% 45.1-59.3%, point 104.1-131.2 oC, 136.0-143.5 They are soluble acetone, ethanol, methanol insoluble n-hexane water. dyeing process achieved high temperature carrier techniques on nylon polyester fibers. characteristics analyzed comparison with commercial (terasil brilliant violet terasil scarlet brown). produced a very attractive hue brown shades good excellent washing, light, hot pressing, rubbing fastness.
 
 KEY WORDS: Carbocyclic, Dyeing activity, Monoazo, Monomeric, Polymeric
 Bull. Chem. Soc. Ethiop. 2021, 35(3), 485-497.
 DOI: https://dx.doi.org/10.4314/bcse.v35i3.2