16 May 2007 Absorbance and color change of LLDPE samples exposed to natural weathering in Aguascalientes City, Mexico
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Proceedings Volume 6422, Sixth Symposium Optics in Industry; 64221D (2007) https://doi.org/10.1117/12.742348
Event: Sixth Symposium Optics in Industry, 2007, Monterrey, Mexico
Abstract
The degradation of weather exposed linear low density polyethylene (LLDPE) specimens, with and without pigments, in Aguascalientes City, Ags. Mexico, during 269 days, was studied. Spectroscopic methods, ultraviolet (UV) spectroscopy and colorimetry, were used to determine the degradation of the specimens. The material used is not pure since they are samples of finished product that contain additives such as anti-oxidants, stabilizers, catalysts. One of the samples contains orange color pigment and the other sample is colorless. The plots describing the absorption bands attributable to the polymeric material show a similar profile in both samples. The bands attributable to pigment do show a considerable decrease in absorbance. The results suggest that the orange pigment has been degrading, as it can also be observed in the color change, while the polymeric material doesn't show any degradation.
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R. González-Mota, R. González-Mota, J.J. Soto-Bernal, J.J. Soto-Bernal, I. Rosales-Candelas, I. Rosales-Candelas, J.T. Vega-Dúran, J.T. Vega-Dúran, } "Absorbance and color change of LLDPE samples exposed to natural weathering in Aguascalientes City, Mexico", Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64221D (16 May 2007); doi: 10.1117/12.742348; https://doi.org/10.1117/12.742348
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