A Study of the Spectral Distributions of Sun-Sky and Xenon-Arc Radiation in Relation to the Degradation of Some Textile Yarns.

The spectral distributions of xenon-arc radiation using several filter systems were compared to August sun-sky radiation measured behind window glass. By locating the main bond-dissociation energies of polyester and nylon at their equivalent photon energies on the spectral distribution curves it was possible to explain the discrepancies in degradation rates, reported in Part I of this work, which occurred between the xenon-arc and outdoor exposures. These differences in spectra may also account for degradation sensitization by anatase during the outdoor exposures. [ABSTRACT FROM PUBLISHER]