Cationic Dyeing Equilibria on Polyacrylonitrile Fibers
- 1 November 1963
- journal article
- research article
- Published by SAGE Publications in Textile Research Journal
- Vol. 33 (11) , 899-910
- https://doi.org/10.1177/004051756303301104
Abstract
Variation of the equilibrium uptake of cationic dyes with pH has shown that sulfonic groups in polyacrylonitrile fibers behave as weak acids. Deviations of experimental results from a Langmuir-type relation derived for competition between different cations for a limited number of anionic sites could be explained by electrostatic repulsive interactions between the sites. What appeared to be favorable interactions were attributed to a partial covalent character in the bond between dye and sulfonate group.Keywords
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