Effect of Ultra Violet Light Irradiation on the Mechanical Property of Nylon 6 Fiber Undyed and Dyed with C. I. Disperse Orange 3

摘要

In this paper, the effect of ultra violet (UV) light irradiation on the stress-strain curve for nylon 6 fibers, treated with a disperse dye and control reference was investigated. The breaking point of the specimen irradiated by UV light was moving toward a lower extension side, depending on the exposure time, while the stress-strain curve kept the basic form of the unirradiated specimen. This phenomenon suggested an assumption that a region with a higher cohesive energy in the amorphous region is more easily damaged than a region with a lower cohesive energy. Until around 20 h UV light exposure, the breaking stress decreased in the order of untreated, controlled and dyed specimen. When the exposure time was more than 20 h, the order of retention values of dyed and controlled specimen was reversed. The results also support the assumption mentioned above.