A Quantitative Spectroscopic Study of the Bleaching Phenomena in Plasticized Formulations Containing PVC Exposed to Outdoor Conditions.

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ID: 52603
2019
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Abstract
In this work, a quantitative spectroscopic study of the bleaching phenomena occurring in plasticized formulations containing poly(vinyl chloride) was performed, proposing a general methodology to comparatively analyze the effect of degrading conditions on the polyene accumulation behaviors (PABs) exhibited by a set of tested formulations. In the study, a set of environmental indexes (temperature (T*), UV energy (UV*), and days with rain) were proposed, which allowed for the suitable globalization of the changing environmental conditions occurring throughout the different degrading periods. A procedure to numerically describe the PAB, followed by each formulation undergoing each degrading condition was also proposed, which required only two primary fitting parameters and four secondary fitting parameters. Then, the combined effects of certain environmental conditions on the PABs were studied, quantifying the stabilizing effects of the rain and the combined decrement on the T* and UV* indexes. Finally, on the basis of the proposed fitting equation and the values of its fitting parameters, the relative importance of the dehydrochlorination reactions as compared with the photo-oxidative reactions simultaneously occurring in the studied systems was estimated.
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gonzlezfalcn2019apolymers Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors González-Falcón, Elizabeth;Arellano, Martin;Sanchez-Peña, M Judith;González-Ortiz, L Javier;
Journal Polymers
Year 2019
DOI
E1481
URL
Keywords
bleaching phenomena degrading behavior outdoor conditions plasticized pvc polyene accumulation behavior semi-empirical model

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