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Sorption of Basic Dyes by Expanded Dispersions of Nomex (DUP) Aromatic Polyamide (Aramid)
Author(s) -
ULERY HARRIS E.
Publication year - 1974
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.1478-4408.1974.tb03177.x
Subject(s) - aramid , sorption , polyamide , dyeing , polymer chemistry , chemistry , aqueous solution , chemical engineering , organic chemistry , materials science , adsorption , fiber , engineering
Aqueous expanded dispersions of an exemplary aromatic polyamide are rapidly dyed at room temperature. Sorption isotherms have been obtained for several basic dyes and for o–nitroaniline. ‘Overdyeing’ is observed at both pH extremes and at high ionic strength. The results are in qualitive agreement with the Donnan theory as generalised by McGregor and Harris. This work supports the view that the ‘difficulty’ in dyeing commercial Nomex Aramid is of kinetic origin.