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Proceedings Paper

Absorbance and color change of LLDPE samples exposed to natural weathering in Aguascalientes City, Mexico
Author(s): R. González-Mota; J.J. Soto-Bernal; I. Rosales-Candelas; J.T. Vega-Dúran
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Paper 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.

Paper Details

Date Published: 16 May 2007
PDF: 7 pages
Proc. SPIE 6422, Sixth Symposium Optics in Industry, 64221D (16 May 2007); doi: 10.1117/12.742348
Show Author Affiliations
R. González-Mota, Ctr. de Investigaciones en Óptica, A. C. (Mexico)
J.J. Soto-Bernal, Ctr. de Investigaciones en Óptica, A. C. (Mexico)
Instituto Tecnológico de Aguascalientes (Mexico)
I. Rosales-Candelas, Ctr. de Investigaciones en Óptica, A. C. (Mexico)
Instituto Tecnológico de Aguascalientes (Mexico)
J.T. Vega-Dúran, Ctr. de Investigación en Ciencia Aplicada y Tecnología Avanzada del IPN (Mexico)

Published in SPIE Proceedings Vol. 6422:
Sixth Symposium Optics in Industry
Julio C. Gutiérrez-Vega; Josué Dávila-Rodríguez; Carlos López-Mariscal, Editor(s)

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