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- W2510127048 abstract "We have measured photoluminescence (PL) spectra induced in polypropylene (PP) by irradiation of photons from an ArF excimer laser under different irradiation atmospheres (air, O2, and vacuum) and thoseinduced by synchrotron radiation in order to examine the photo-induced chemical reaction. The PL due tothe oxidation that relates essentially to the degradation of PP is examined in this research by comparingPL spectrum induced by the irradiation in vacuum and the one induced in oxygen. The important resultobtained is that the PL component around 4 eV decreases with an increase in irradiation time irrespectiveof the irradiation atmosphere. On the other hand, a new PL component around 3 eV appears and increaseswith an increase in irradiation time only in the case that the laser irradiation was done in vacuum. Bycomparing the PL properties observed in low-density polyethylene used for reference, the decrease of the4-eV PL is considered to be due to the decomposition of unsaturated ketone or benzene ring present in PPas an impurity or antioxidant, while the appearance and increase of the 3-eV PL is probably caused by the double bonds induced by the irradiation. These results suggest that different chemical groups are induced depending on the irradiation atmosphere." @default.
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- W2510127048 date "2001-01-01" @default.
- W2510127048 modified "2023-09-22" @default.
- W2510127048 title "Photoluminescence in Polypropylene Induced by Ultraviolet Photons" @default.
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- W2510127048 doi "https://doi.org/10.1541/ieejfms1990.121.9_865" @default.
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