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The accessibility of sulphonic acid groups in basic dyeable polyester fibers. I. The prevention of fiber hydrolysis during dyeing
Author(s) -
Ingamells W.,
Lilou S. H.,
Peters R. H.
Publication year - 1981
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.1981.070261211
Subject(s) - dyeing , hydrolysis , polyester , fiber , viscosity , materials science , sodium , chemical engineering , synthetic fiber , ion , chemistry , composite material , polymer chemistry , organic chemistry , engineering
The rate of acid hydrolysis of a basic dyeable polyester in water, before and after heat‐setting, has been investigated. Intrinsic viscosity measurements and chemical analysis have been used to establish experimental conditions under which the hydrolysis is inhibited. It is suggested that the critical stage of the hydrolysis mechanism is the exchange of sodium ions from the sulphonate groups in the fiber for hydrogen ions.