Abstract
The photo-oxidative degradation study of nylon 66 was carried out in a polychromatic irradiation chamber (Sepap 12/24, λ≥290 nm) at 60°C in air. The extent of photo-oxidation was monitored by Fourier transform infrared spectrometry. The sample underwent extensive changes in hydroxyl, carbonyl and amorphous region of infrared upon irradiations. The photo-products were characterized by i.r. and ultraviolet spectroscopy. The broadening of hydroxyl and carbonyl absorption bands indicated more than one species. The photo-oxidation mechanism implies the same intermediate photo-products. The kinetics of the photo-degradation also has been studied.
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