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Some Observations on the Concentration Dependence of Diffusion Coefficients of Acid Dyes in Nylon
Author(s) -
Hopper M. E.,
McGregor R.,
Peters R. H.
Publication year - 1970
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.1478-4408.1970.tb02940.x
Subject(s) - diffusion , salt (chemistry) , distribution (mathematics) , acid dye , chemistry , nylon 6 , electrochemistry , analytical chemistry (journal) , materials science , thermodynamics , chromatography , polymer , organic chemistry , mathematics , dyeing , electrode , physics , mathematical analysis
The diffusion of acid dyes in nylon 6.6 film has been examined by the measurement of the concentration distribution through the film. For a series of films prepared by different methods, the shape of the distribution curve was independent of the history of the film. Dyes of different basicity have been shown to give approximately the same shape of curve, provided that the surface concentrations are the same. The variations of the concentration‐distribution curve with salt concentration and pH are given. The results are explained in terms of the electrochemical potentials of the dyes.