International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Determination of bonding performance of several modified wood adhesives

Mustafa Altinok1, Musa Atar1, Hakan Keskin2, Suleyman Korkut3* and Ilhan Kocaturk1
1Department of Furniture and Decoration, Faculty of Technical Education, Gazi University,  06500 Besevler, Ankara, Turkey. 2Department of Industrial Technology, Industrial Arts Education Faculty, Gazi University, 06830 Gölbasi, Ankara, Turkey. 3Department of Forest Industrial Engineering, Faculty of Forestry, Duzce University, Beciyorukler Campus, 81620 Duzce, Turkey.
Email: [email protected]

  •  Accepted: 22 December 2010
  •  Published: 18 January 2011

Abstract

We have assessed the effect on bonding performance of modifying synthetic wood adhesives. Wood samples were prepared from Scots pine (Pinus sylvestris L.) and oriental beech (Fagus orientalis L.). Samples were bonded using poly(vinyl acetate) (PVAc) and urea-formaldehyde (UF) adhesives modified with melamine-formaldehyde (MF) and phenol-formaldehyde (PF). Modified formulations included PVAc alone, PVAc + UF (at 15, 35 and 50% UF), UF alone, UF + MF (at 15, 35 and 50%), and UF + PF (at 15, 35 and 50% PF). Samples were exposed to three experimental environments: Standard atmosphere, cold water, and boiling water. For bonding strength determination, we used DIN 53 255 standard. We conclude that the adhesive modifications tested generally have no significant effect on bonding performance under standard atmospheric conditions, but do increase bonding performance under cold and boiling-water conditions. The best adhesive bonding strength was found using oriental beech samples with the UF + MF (50%) adhesive: 9.24 N/mm2 bonding strength under standard atmosphere conditions, 6.06 N/mm2 in cold water, and 4.39 N/mm2 in boiling water.

 

Key words: Adhesive modification, poly(vinyl acetate) (PVAc), urea-formaldehyde (UF), melamine-formaldehyde (MF), phenol-formaldehyde (PF), bonding strength, bonding performance.