N. Katsuda et al., PHOTODEGRADATION OF AN ANTHRAQUINONE TYPE DISPERSE DYE ON POLYESTER, DIACETATE, AND TRIACETATE FIBERS, AND IN SOLUTION, Dyes and pigments, 34(2), 1997, pp. 147-157
In a previous paper, the photodegradation behavior of an azo type disp
erse dye on polyester and nylon fibers, was reported (Katsuda, N., Tak
agishi, T., Yabushita, S. & Hshizume, S., Dyes and Pigments, 31 (1996)
291). In this present paper, the photodegradation behavior of an anth
raquinone type disperse dye on fibers such as polyester, diacetate, an
d triacetate, and in particular on polyester fiber, and in solution ha
ve been investigated. The fiber itself and the dyed fiber were irradia
ted with monochromatic light of 20 different wavelengths from 201 to 7
01 nm, using as light source a Xenon lamp divided into 20 wavelength p
arts. The photodegradation behavior at each wavelength was examined to
elucidate the mechanism of the photofading of the dye on the fibers.
It was observed that the disperse dye on polyester fiber was significa
ntly affected at around 316 nm. The same dye on diacetate and triaceta
te fibers underwent photofading near 230 and 259 nm, respectively. The
fiber itself was influenced remarkably at the corresponding wavelengt
h. To clarify these situations, the photodegradation of the dye in eth
yl acetate containing dissolved polyester was checked. The dye was fou
nd to be degraded markedly at 316 nm also when polyester was present i
n the system. (C) 1997 Elsevier Science Ltd.