Relation between chemical structure of yellow disperse dyes and their lightfastness |
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Authors: | Sung Dong Kim Eun Jin Park |
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Institution: | (1) Department of Textile Engineering, Konkuk University, 1 Hwayangdong, 143-701 Seoul, Korea;(2) Jung Woo Fine Co., Shiwha industrial park, 1250-7 Jungwangdong, 429-850 Kyunggido, Korea |
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Abstract: | Five yellow disperse dyes were synthesized and their dyeing, fastness and photodegradation behaviors were investigated. It
was found that dyes derived from phenylindole and N-alkylaminobenzene showed dye uptake directly proportional to the dye concentration,
but the build-up of dyes derived from carbazole and pyridone were not good. The wavelength at maximum absorption, molar extinction
coefficient, and the tendency to the photodegradation were strongly dependent on the electron donating ability of the coupling
component. The dye, whose coupling component was phenylindole, possessed the excellent dyeing properties and the high degree
of lightfastness. UVA had an effect on the inhibition of the photodegradation especially for the easily photodegradable dyes. |
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Keywords: | Lightfastness Disperse dye Coupling components Phenylindole UVA |
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