Abstract
Abstract The irradiation effects of intense ultraviolet (UV) light from ArF and KrF excimer lasers on poly(vinylidene fluoride) (PVdF) were studied. The optical absorption spectroscopy made it clear that irradiation with ArF and KrF excimer laser light mainly caused the formation of diene and triene structures, respectively. From the dependence on the laser intensity it was found that ArF and KrF laser-induced reactions proceeded via single-photon and multi-photon processes, respectively. The wavelength dependence was explained by photochemical and photothermal effects of ArF and KrF excimer lasers, respectively. These results indicate that the distinction of the photo-reaction between the two is closely related to the difference in the absorption sites.
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