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- W2890348811 abstract "The photo-oxidation behaviour of polypropylene/maleic anhydride-grafted polypropylene/organic modified montmorillonite (PP/PPgMA/OMMT) composites with short wavelength (UVC) and long wavelength (UVA) ultraviolet radiation was examined. The samples were prepared in a co-rotating twin-screw extruder and compatibilizers with different degrees of maleation were used. The photo-oxidative stability was studied using FTIR spectroscopy and microscopy. During UVA exposure, the rate of photo-oxidation of PP/PPgMA/OMMT increased with the amount of maleic anhydride from 0.1 to 0.5 wt.% in PPgMA. However, even after 2500 h of exposure to the radiation, the FTIR spectrum of pristine PP did not show significant changes. For UVC radiation, the rate of photo-oxidation of PP/PPgMA/OMMT composites was the same as that of pristine PP. On the other hand, there was a difference between PP and PP/PPgMA/OMMT composites in the formation of a crack on the back surfaces of the sheets facing the UVC sources. The difference was due to the presence of Fe 3+ in clay layers that had the effect of UV-protection and blocking in the UVC region." @default.
- W2890348811 created "2018-09-27" @default.
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- W2890348811 date "2015-02-01" @default.
- W2890348811 modified "2023-09-25" @default.
- W2890348811 title "Wavelength Sensitivity in Polypropylene/Clay Composite Photo-Oxidation" @default.
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- W2890348811 doi "https://doi.org/10.1177/096739111502300205" @default.
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