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Effect of a synthetic tanning agent on the diffusin properties of an acid dye in nylon 6
Author(s) -
Guthrie J.
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070270726
Subject(s) - diffusion , adsorption , acid dye , nylon 6 , yield (engineering) , polymer , materials science , chemical engineering , polymer chemistry , steric effects , chemistry , organic chemistry , thermodynamics , composite material , dyeing , physics , engineering
The diffusion coefficients of an acid dye in nylon 6 polymer hav been measured using two different techniques, one based on the rate at which the fiber absorbs the dyestuff and the other employing the rate of transport of dye through a nylon film. Both of these methods yield diffusion coefficients of similar magnitude. The effect of a synthetic tanning treatment on the diffusion coefficients has been studied and it has been shown that a significant reduction in the diffusion coefficient is only obtained from data based on adsorption measurements. It is concluded that the decrease of rate of dye uptake caused by the presence of the syntan is due mainly to the prevention of initial dye adsorption rather than electrical repulsion or steric effects proposed in earlier studies. These results also highlight the dangers in using adsorption studies as a method for determining diffusion parameters.