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Dyeing of polyester fabrics using novel diazo disperse dyes derived from 1, 4-bis (2-amino-1, 3, 4-thiadiazolyl) benzene
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Dyeing of polyester fabrics using novel diazo disperse dyes derived from 1, 4-bis (2-amino-1, 3, 4-thiadiazolyl) benzene
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Journal Article
Dyeing of polyester fabrics using novel diazo disperse dyes derived from 1, 4-bis (2-amino-1, 3, 4-thiadiazolyl) benzene
2024
Overview
PurposeThis study aims to show the dyeing behaviour of polyester fabrics using four novel heterocyclic disperse dyes.Design/methodology/approachThe four dyes were synthesized based on 5, 5'-(1, 4-phenylene) bis (1, 3, 4-thiadiazol-2-amine) as a diazonium compound. The UV/Vis absorption spectroscopic data of these disperse dyes while dyeing polyester fabrics were investigated. Following this, the dyeing properties of these dyes on polyester fabrics were investigated under acid condition.FindingsThe results showed that increasing the dyeing temperature from 80°C to 100°C led to an increase in dye uptake for all dyes, but further increases of the temperature to 130°C led to higher dye uptake for dye 3 as the dye exhaustion increased by about 50% from 55.9% to 91.4%.Originality/valueThis study is important as it introduces new dyes for the dyeing of polyethylene terephthalate (PET) fibres with colours that range from yellowish orange to bluish yellow and scarlet red and all with excellent brightness, levelness and depth of shade.
