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.
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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literatur
American National Standards Institute (ANSI) 1979: American National Standard, mat-formed wood particleboard, ANSI A208.1
American Society for Testing and Materials 1982: Standard methods of evaluating the properties of wood-based fiber and particle panel materials. ASTM D 1037-78. Philadelphia, PA
Kelly, M. W. 1977: Critical literature review of relationships between processing parameters and physical properties of particleboard. USDA Forest Serv. Gen. Tech. Rep. FPL-10. Forest Prod. Lab., Madison, WI
Laufenberg, T. L. 1986: Using gamma radiation to measure density gradients in reconstituted wood products. Forest Prod. J. 36:59–62
Ranta, I.: May, H. A. 1978: Zur Messung von Rohdichteprofilen an Spanplatten mittels Gammastrahlen. Holz Roh-Werkstoff 36:467–474
River, B.H.; Gillespie, R.H.; Baker, Andrew J. 1981:Accelerated aging of phenolic bonded hardboards and flakeboards. USDA Forest Serv. Res. Pap. FPL 393. Forest Prod. Lab., Madison, WI
Rowell, R. M. 1982: Distribution of acetyl groups in southern pine reacted with acetic anhydride. Wood Sci. 15:172–182
Rowell, R.M. 1984: Chemistry of solid wood. R.M. Rowell (Ed.): Advances in chemistry, series No. 207, Chap. 4: Penetration and reactivity of cell wall components. Am. Chem. Soc. 175–210
Rowell, R.M.; Tillman, A.-M.; Liu, Z. 1986: Dimensional stabilization of flakeboard by chemical modification. Wood. Sci. Technol.20:83–95
Youngquist, J.A.; Krzysik, A.; Rowell, R.M. 1986: Dimensional stability of acetylated aspen flakeboard. Wood Fiber Sci. 18:90–98
Author information
Authors and Affiliations
Additional information
Maintained at Madison, Wis., in cooperation with the University of Wisconsin
Rights and permissions
About this article
Cite this article
Youngquist, J.A., Rowell, R.M. & Krzysik, A. Mechanical properties and dimensional stability of acetylated aspen flakeboard. Holz als Roh-und Werkstoff 44, 453–457 (1986). https://doi.org/10.1007/BF02608064
Issue Date:
DOI: https://doi.org/10.1007/BF02608064