http://www.cnr.it/ontology/cnr/individuo/prodotto/ID98140
Relationship betwen wood gluability and surface composition (Contributo in atti di convegno)
- Type
- Label
- Relationship betwen wood gluability and surface composition (Contributo in atti di convegno) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- SANTONI I.; PIZZO B. (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
- The effect of wood surface composition on wood gluability was evaluated. Two hardwood species commonly used in the woodworking industry in the Mediterranean region were selected for this study, in particular oak (Quercus decidua sp.) and beech (Fagus sylvatica L.). Chemical composition of the surface were determined by GC-MS technique after the cut and 24 hours later showing a redistribution of extractives on the surface.
Cation Exchange Capacity (CEC) in bulk wood was tested and the lignocellulose linked carboxyl groups evaluated. Oak results in a higher free acid carboxyl groups and total carboxyl groups content than beech.
These properties were compared with adhesion test (shear strength), according to the EN 205. Standard test was carried out on two water-based adhesive products (polyvinyl-acetate dispersions) KM and 2252M from Vinavil S.p.A. The results evidenced a good behaviour of 2252M on both the considered species while in the case of KM, beech appreciably decreases after the conditioning phase in water whereas oak does not evidence any problems. Different explanations were proposed: one of them suggests that an increase of some extractives on the surface was related to a lower interfacial stress during the water conditioning phase probably due to a swelling effect of the glue-line.
(literal)
- Titolo
- Relationship betwen wood gluability and surface composition (literal)
- Prodotto di
- Autore CNR
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