Water uptake and mechanical characteristics of wood fiber-polypropylene composites

被引：0
|
作者：
A. Viksne
A. K. Bledzki
L. Rence
R. Berzina
机构：
[1] Riga Technical University,Institute of Polymer Materials
[2] Kassel University,Institut für Werkstofftechnik, Kunststoff
来源：
Mechanics of Composite Materials | 2006年 / 42卷
关键词：
polypropylene; wood fiber; strength properties; water sorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of mixing process (in a two-roll mill, high-speed mixer, or twin-screw extruder) on the strength properties of polypropylene/wood fiber composites was studied. The best results were obtained for composites compounded in a twin-screw extruder. The water uptake and the influence of moisture on the flexural strength (σfl) and modulus (Efl) were studied by immersion of the composites in water at 20, 50, and 90°C. Most strongly the moisture affected the value of Efl, but the degree of water uptake and the change in σfl and Efl also depended on temperature and the presence of a modificator—maleated polypropylene (MAH). MAH improved the strength properties of the composites both in dry and wet states and also decreased the extent of water uptake and swelling in cyclic (soaking/drying) tests.
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页码：73 / 82
页数：9
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