Vacuum Ultra-violet Photo-Activation Bonding of Polyoxymethylene Plate

Vacuum ultraviolet （VUV） irradiation was applied to photo-activation bonding of polyoxymethylene （POM） plates. The photo-activated POM plates were bonded directly below the melting point. Their VUV-irradiated POM surfaces were analyzed using X-ray photoelectron spectroscopy （XPS） and Fourier transform infrared spectroscopy （FTIR）. Results of these analyses suggest that the VUV irradiation introduced hydroxy groups through oxidation, mainly of ethylene units.