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

Abstract

The effects of xenon-arc radiation, using an Atlas Weather-Ometer and a clear glass pyrex filter system, on the breaking strength, extension-to-break, and the energy-to-break for several nylon, polyester, and polyester/cotton yarns were compared to these of outdoor exposure behind window glass. Both types of exposure resulted in similar, related rates of loss for these properties for all yarns. Lamp age in the Weather-Ometer intluenced degradation rates in some cases. All nylon yarns degraded slowly during Weather-Ometer exposure and rapidly outdoors behind window-glass, in comparison to polyester, while the polyester/cotton yarns degraded at similar rates in both locations. Yarn-denier variation and the presence of an optical, brightener had no detectable effect on degradation rates. Sensitization by anatase in nylon and polyester yarns occurred during outdoor exposure, but not during Weather-Ometer exposure.

The effect of dispersion technique, silver particle loading, and reduction method on the properties of polyacrylonitrile–silver composite nanofiber

“…Hydrazine method may also form crosslinking between PAN chains leading to an increased tensile strength [22]. When compared to the hydrazine method, samples treated by xenon arc lamp have less breaking strength than the samples treated with hydrazine due to degradation effect of xenon arc light on polymer solution [23,24]. Thus, while the strength of 100% PAN nanofiber treated with hydrazine hydroxide is higher than that of 100% PAN (not treated), the strength of 100% PAN reduced by xenon arc solution is less than that of 100% PAN (not treated).…”

Photodegradation of Lyocell Fibers Through Exposure to Simulated Sunlight

“…They concluded that the process produces carbonyl and hydroxy-peroxide products, and that photo-oxidation occurs primarily in the surface layers because of the localized presence there of ultraviolet-absorbing impurities. Wall and Frank [30] compared the effects of controlled ultraviolet radiation on the breaking strength and extension to break for several nylon and polyesterkotton yams to those on the same properties of samples exposed outdoors behind window glass. They found that the two kinds of exposure resulted in similar rates of loss for these properties for all yarns and yarn-denier variations, and the presence of an optical brightener had no detectable effect on degradation rates.…”