Abstract
The wavelength sensitivity of polyamide 6 films exposed to filtered xenon arc radiation was studied by the sharp cut filter technique based on the changes in UV absorption. The spectral sensitivity curves and activation spectra were obtained. It was found that the photo-oxidation of PA6 can be caused by light in a wide wavelength range of about 260–480 nm. From the activation spectra it was shown that there exist two distinctly separate spectral regions responsible for causing PA photo-oxidation: wavelengths below 300 nm and in the range of 340–400 nm. The results are discussed from the point of view of the initiation mechanism of PA photo-oxidation..
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