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Properties of laboratory made yellow poplar (Liriodendron tulipifera) laminated veneer lumber: effect of the adhesives

Eigenschaften von im Labor hergestelltem Furnierschichtholz aus Tulpenbaumholz (Liriodendron tulipifera): Einfluss der Klebstoffe

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Abstract

Four different commercial resin formulations namely cross-linked polyvinyl acetate (XPVAc), melamine urea formaldehyde (MUF), urea formaldehyde (UF) and melamine formaldehyde (MF) were used to produce laminated veneer lumber (LVL) from yellow poplar veneers in the laboratory. Physical and mechanical properties were evaluated using ASTM (D 1037, D 906, D 5456) standards and compared. Internal bond, tensile shear and block shear strengths of specimens subjected to accelerated (boiled water) and cyclic (repeated cold water) conditions were also determined. Strength properties of yellow poplar LVL were improved compared with the solid wood. The properties of XPVAc bonded LVL were superior or comparable to the thermosetting adhesives. This study clearly indicated that cross-linked PVAc can be used to manufacture LVL with acceptable properties.

Zusammenfassung

Vier handelsübliche Harze, vernetztes Polyvinylacetat (XPVAc), Melaminharnstoffformaldehyd (MUF), Harnstoffformaldehyd (UF) und Melaminformaldehyd (MF), wurden zur Herstellung von Laborfurnierschichtholz (LVL) aus Tulpenbaumholzfurnieren verwendet. Die physikalischen und mechanischen Eigenschaften wurden gemäß ASTM (D 1037, D 906 und D 5456) untersucht und verglichen. Querzugfestigkeit, Zugscherfestigkeit und Blockscherfestigkeit der Proben wurden nach schneller Bewitterung (kochendes Wasser) und zyklischer klimatischer Beanspruchung (mehrfach kaltes Wasser) ebenfalls bestimmt. Im Vergleich zu Massivholz zeigte Tulpenbaum-Furnierschichtholz verbesserte Festigkeitseigenschaften. Die Eigenschaften von mit XPVAc verklebtem LVL waren besser oder gleich denjenigen, die mit Duroplasten verklebt wurden. Diese Studie zeigt deutlich, dass vernetztes Polyvinylacetat zur Herstellung von LVL mit akzeptablen Eigenschaften verwendet werden kann.

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Authors and Affiliations

  1. Laboratory of Wood Science and Technology, Department of Forestry, 126, Natural Resources Building, Michigan State University, 48824, East Lansing, MI, USA

    S. R. Shukla & D. Pascal Kamdem

  2. Institute of Wood Science and Technology, 18th Cross, 560003, Malleswaram, Bangalore, India

    S. R. Shukla

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  1. S. R. Shukla
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  2. D. Pascal Kamdem
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Correspondence to D. Pascal Kamdem.

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Shukla, S.R., Kamdem, D.P. Properties of laboratory made yellow poplar (Liriodendron tulipifera) laminated veneer lumber: effect of the adhesives . Eur. J. Wood Prod. 67, 397–405 (2009). https://doi.org/10.1007/s00107-009-0333-1

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  • DOI: https://doi.org/10.1007/s00107-009-0333-1

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