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The Behaviour of Disperse Dyes at High Temperatures
Author(s) -
MCDOWELL WILLIAM
Publication year - 1973
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.1478-4408.1973.tb03146.x
Subject(s) - polyester , vapor pressure , kinetics , chemistry , phase (matter) , instability , partial pressure , chemical engineering , vapor phase , thermodynamics , materials science , organic chemistry , mechanics , oxygen , physics , quantum mechanics , engineering
Investigations on disperse dyes in the vapour phase are described. The various methods of determining the vapour pressure of such dyes at high temperatures are compared. By means of direct spectrophotometric determination, a relation is established between the partial vapour pressure of a disperse dye over its solution in polyester, and its concentration in polyester. It is shown that the heat‐fastness properties of such dyes depend on their vapour pressures, any exceptions being due to the instability of the particular dye under the conditions of testing. Finally, the kinetics of such processes are considered and some attempt is made to analyse practical systems.