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The variations of structure and property of poly(p-dioxanone) (PPDO) in the process of photo-oxidative degradation and the mechanism of degradation were investigated in this work. The photo-oxidative degradation of PPDO was performed in air under ultraviolet light with two kinds of wavelength 365.0 nm and 253.7 nm. The extent of photo-oxidative degradation of the polymer was determined by morphological...