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- W2938559575 abstract "The aim of this work was to evaluate the photo degradation of PP films containing photo stabilizers, a ultraviolet absorber and a hindered amine light stabilizer (HALS), and a red pigment. The films were produced by extrusion and exposed to the UV radiation in the laboratory for up to 15 weeks. The results obtained from FTIR, UV-vis and colorimetry showed that the pigment reduced the rate of chemical degradation both in non-stabilized and photo stabilized films, and the influence was more significant for the combination of pigment and HALS. However, the color shift was more evident when the pigment was present, suggesting that this additive may suffer chemical rearrangements during exposure but do not generate free radicals that can initiate degradation of the polymer. The mechanical properties of the films followed the same trend as the other results, but the unexposed films showed a peculiar behaviour, with much higher tensile strength when the pigments were present. X-ray diffraction and DSC analyses suggested that this might be related to differences in crystal structure." @default.
- W2938559575 created "2019-04-25" @default.
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- W2938559575 date "2019-01-01" @default.
- W2938559575 modified "2023-10-01" @default.
- W2938559575 title "The Effect of Red Pigment and Photo Stabilizers on the Photo Degradation of Polypropylene Films" @default.
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- W2938559575 doi "https://doi.org/10.1590/1980-5373-mr-2018-0708" @default.
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