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The Dyeing of Cellulose Acetate with Non‐ionic Dyes
Author(s) -
Majury T. G.
Publication year - 1954
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.1478-4408.1954.tb02003.x
Subject(s) - dyeing , sublimation (psychology) , chemistry , ionic bonding , hydrogen bond , cellulose acetate , molecule , dipole , cellulose , standard enthalpy of formation , inorganic chemistry , organic chemistry , ion , psychology , psychotherapist
The heats of dyeing of five “model” dyes on cellulose acetate have been meeaured. By combining these with the heats of solution and sublimation of the dyes, the absolute heats of association between dyes and substrate may be evaluated. This has been done for the two dyes for which data on heats of sublimation are available; values of the order of ‐ 20 kcal./mole are obtained. The bond energies appear to be chiefly ascribable to interaction between the permanent dipoles of the carbonyl groups in the substrate and permanent or induced dipoles in the dye molecules. There ere indications in the two cases examined that, if intermoleculer hydrogen bonds exist in the dye crystals, then hydrogen bonds may reasonably be postulated also between the dyes and the substrate.