Adhesive bonding of beech wood modified with a phenol formaldehyde compound |
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| Authors: | Stergios Adamopoulos Alireza Bastani Patricia Gascón-Garrido Holger Militz Carsten Mai |
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| Affiliation: | 1. Wood Biology and Wood Products, Burckhardt Institute, Georg-August-University G?ttingen, Büsgenweg 4, 37077, G?ttingen, Germany
2. Department of Forestry and Management of Natural Environment, Technological Educational Institute of Larissa, 431 00, Karditsa, Greece
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| Abstract: | Untreated (controls) and phenol–formaldehyde (PF)-modified beech wood (10 and 25?% solid content) were glued with phenol resorcinol formaldehyde (PRF) and polyvinyl acetate (PVAc). Shear strength of PRF-bonded specimens was higher than that of PVAc-bonded ones under dry and wet conditions irrespective of the pre-treatment. Under dry conditions, only PVAc-bonded specimens exhibited reduction in shear strength due to PF-modification with 25?% PF concentration as compared to the controls. PF treated wood provided inferior bonding under wet conditions with the exception of 25?% PF concentration specimens glued with PRF adhesive. Modification with PF resulted in a decrease of adhesive penetration into the porous network of interconnected cells, especially at 25?% PF concentration. |
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