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Kinetics of the Reaction between Reactive Dyes and Cotton in Dyeing from Long Liquors
Author(s) -
BECKMANN W.,
HILDEBRAND D.
Publication year - 1965
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1965.tb02610.x
Subject(s) - dyeing , chemistry , kinetics , reactive dye , adsorption , reaction rate , molecule , reaction rate constant , polymer chemistry , photochemistry , organic chemistry , catalysis , physics , quantum mechanics
For a fibre–reactive dichloroquinoxaline carbonamide dye, the amounts of dye substantively and chemically bound to cotton fibre in dyeing from a long liquor have been determined. The reaction between dye and fibre was neither pseudo first– nor second–order. The relative rate of reaction (based on the amount of dye substantively bound and still reactive) was a function of the total amount of dye present on the fibre, and was about twenty–five times smaller than the corresponding rate constant for the reaction with sorbitol. An interpretation of the results implies that effects of heterogeneity slow down the reaction and that dye molecules can be bound substantively in different kinds of link (by adsorption in special topochemical positions or by association) so as to differ in their probability of reacting with the fibre.