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Holz als Roh- und Werkstoff

, Volume 44, Issue 12, pp 453–457 | Cite as

Mechanical properties and dimensional stability of acetylated aspen flakeboard

  • J. A. Youngquist
  • R. M. Rowell
  • A. Krzysik
Forschung und Praxis

Abstract

Aspen flakes, reacted with acetic anhydride to approximately 20% weight gain, were pressed into flakeboards using a watersoluble phenolic resin. Microphotographs revealed little penetration of the resin into the acetylated wood. Water sorption and thickness swelling are greatly reduced with acetylation; however, internal bond and moduli of rupture and elasticity were also significantly reduced as compared to control boards.

Keywords

Density Profile Control Specimen Internal Bond Control Board Forest Prod 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Mechanische Eigenschaften und Dimensionsstabilität von acetylierten Pappel-Spanplatten

Zusammenfassung

Pappelspänedie bis zu einer Gewichtszunahme von 20% mit Essigsäureanhydrit behandelt worden waren, wurden mit einem wasserlöslichen Phenolharz zu Spanplatten verpreßt. Mikrofotos zeigten eine nur geringe Eindringung des Harzes in die acetylierten Späne. Die Wasserabsorption und die Dickenquellung waren durch die Acetylierung stark reduziert. Aber auch die Querzugfestigkeit, die Beigefestigkeit und der Elastizitätsmodul waren, im Vergleich zu nicht behandelten Kontrollen, signifikant vermindert.

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Literatur

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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • J. A. Youngquist
    • 1
  • R. M. Rowell
    • 1
  • A. Krzysik
    • 2
  1. 1.Forest Service, Forest Products LaboratoryU.S. Department of AgricultureMadison
  2. 2.University of AgricultureWarsawPoland

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