3—EQUILIBRIA ON NYLON OF ANIONIC DYES BASED ON ?-NAPHTHYLAMINE??-NAPHTHOL
- 1 January 1958
- journal article
- research article
- Published by Taylor & Francis in Journal of the Textile Institute Transactions
- Vol. 49 (1) , T33-T39
- https://doi.org/10.1080/19447025808660116
Abstract
The sorption by nylon at pH values from 3 to 10 of dyes based on a-naphthylamine→β-naphthol, which have different degrees and positions of sulphonation, has been measured. Yarns of different amine end-group contents and with different basic stabilizers have been used. At all pH sorption is directly dependent on amine end-group content. Increase in the degree of sulphonation decreases the number of equivalents of the dye which are sorbed. The characteristics of the pH-dependence of the sorption are related, inter alia, to the basicity of the basic end-group in the yarn and to the potentiometric titration curve of the dye acid.Keywords
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