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Photodegradation of acid dyes in nylon films
Author(s) -
Lishan David G,
Harris Paul W,
Brahim Karime,
Jackson Robert L
Publication year - 1988
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.1478-4408.1988.tb01133.x
Subject(s) - photodegradation , photochemistry , photodissociation , quantum yield , chemistry , polymer , yield (engineering) , materials science , photocatalysis , organic chemistry , catalysis , optics , fluorescence , metallurgy , physics
The photodegradation of three representative acid dyes commonly used to colour nylon was studied in nylon films. It was observed that irreversible photodegradation of the dyes occurs only at wavlengths shorter than 350nm and that the quantum yield increases as the photolysis wavelength decreases. It was also found that u.v. photolysis of the dyes is partially reversible and that photodegradation is inhibited by oxygen. Evidence is presented that photodegradation occurs by a reduction process, involving hydrogen transfer from the nylon polymer to the excited dye.