期刊
POLYMER DEGRADATION AND STABILITY
卷 93, 期 8, 页码 1405-1414出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2008.05.024
关键词
carbonyl concentration; color change; crazing; weathering; wood composition; wood plastic composite
资金
- The Office of Naval Research [N00014-03-1-0949]
- The National Research Initiative of the USDA Cooperative State Research, Education and Extension Service [2005-35103-15243]
The effects of outside and accelerated (xenon-arc and UVA) weathering on the visual appearance and chemical changes of wood plastic composite (WPC) formulations based on high density polyethylene (HDPE) and polypropylene (PP) were investigated. Colorimetry, scanning electron microscopy, Fourier transform infrared spectroscopy (FT-IR), and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) were employed in this study. The study showed that for both outside and accelerated weathering, longer exposure time increased the degree of color change (and lightness), carbonyl concentrations, and wood loss on weathered WPC surfaces. HDPE-based WPC exhibited decreased lightening, carbonyl concentrations, and wood content loss when compared to PP-based WPC. From this study, relationships between chemical and color changes that occurred during exterior weathering of HDPE-based WPC were established. Oxidation and degradation of wood lignin influenced WPC color changes (lightening) during weathering. (C) 2008 Elsevier Ltd. All rights reserved.
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