Wood plastic composites weathering: Visual appearance and chemical changes

被引：217

作者：

Fabiyi, James S. ^{[1
]}

McDonald, Armando G. ^{[1
]}

Wolcott, Michael P. ^{[2
]}

Griffiths, Peter R. ^{[3
]}

机构：

[1] Univ Idaho, Dept Forest Prod, Moscow, ID 83844 USA

[2] Washington State Univ, Wood Mat & Engn Lab, Pullman, WA 99164 USA

[3] Univ Idaho, Dept Chem, Moscow, ID 83844 USA

来源：

POLYMER DEGRADATION AND STABILITY | 2008年 / 93卷 / 08期

关键词：

carbonyl concentration; color change; crazing; weathering; wood composition; wood plastic composite;

D O I：

10.1016/j.polymdegradstab.2008.05.024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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.

引用

页码：1405 / 1414

页数：10

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