Combined effect of water uptake and temperature on wood polymer composites

被引：35

作者：

Fortini, Annalisa ^{[1
]}

Mazzanti, Valentina ^{[1
]}

机构：

[1] Univ Ferrara, Dept Engn, Via Saragat 1, I-44122 Ferrara, Italy

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2018年 / 135卷 / 35期

关键词：

ageing; mechanical properties; microscopy; REINFORCED POLYPROPYLENE COMPOSITES; MECHANICAL-PROPERTIES; PLASTIC COMPOSITES; WOOD/POLYPROPYLENE COMPOSITES; BENDING PROPERTIES; FIBER COMPOSITES; NATURAL FIBER; ABSORPTION; BEHAVIOR; POLYETHYLENE;

D O I：

10.1002/app.46674

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Wood polymer composites are materials frequently used for outdoor applications, since they can operate under a large range of temperature and moisture conditions. The present work investigates the combined effect of water soaking and temperature (ranging from 10 up to 40 degrees C) on wood flour filled high density polyethylene. Water soaking tests have revealed that the percentage of absorbed water at the saturation plateau increases with temperature due to the induced stiffness reduction of the polymeric matrix. This hypothesis has been confirmed by scanning electron microscopy analyses, which has allowed to observe the filler-matrix interface and to measure the wood flour particle size. In addition, instrumented Charpy impact tests have shown a strong toughness reduction as a consequence of fiber-matrix debonding induced by particle swelling, which worsens with temperature. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46674.

引用

页数：9

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