SOME MECHANICAL PROPERTIES OF PLYWOOD PRODUCED FROM EUCALYPTUS, BEECH, AND POPLAR VENEER

Bekir Cihad Bal, İbrahim Bektaş

Abstract


In this study, we determined the flexural properties and tensile shear strength of five-ply plywoodpanels produced with eucalyptus (Eucalyptus grandis), beech (Fagus orientalis), and hybrid poplar(Populus x euramericana) using urea-formaldehyde (UF), melamine-urea-formaldehyde (MUF) andphenol-formaldehyde (PF) adhesives. Flexural properties were tested on both parallel and perpendicularto grain samples. Tensile shear-strength tests were conducted on four glue lines of the plywood panels,and the effects of species of trees, type of adhesives, and direction of load were determined. The resultsof variance analyses showed that the effects of species of trees, direction of load, and type of adhesiveon flexural properties were significant, but it was determined by specific flexural properties that the effectof the type of adhesive was based on the density of the plywood. In addition, as a result of findings, itcan be said that specific mechanical properties may be a good predictor for comparative studies.

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