University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Selected Publication:
Gossenreiter, W; Teischinger, A; Buksnowitz, C; Hansmann, C.
(2013):
BONDING PROPERTIES OF TEAKWOOD (TECTONA GRANDIS L.f.) WITH PUR AND MUF IN DEPENDENCE ON SURFACE TREATMENT TIME
WOOD RES-SLOVAKIA. 2013; 58(1): 1-10.
- Abstract:
- The present study investigates bonding properties of plantation teak applying polyurethane (PUR) and melamine-urea-formaldehyde (MUF) adhesives. According to literature the bonding properties degrade as a function of the time-span between surface processing and assembling due to extractives that migrate to the surface. In the present study the effect of extractive migration was determined by means of contact angle measurements. In addition the tensile shear strength (EN 302-1) and two different delamination tests were performed. To determine the respective bond strength the samples were assembled in different time intervals after processing, i.e. freshly processed samples as well as three, seven and fourteen days afterwards. Although the contact angle measurements indirectly proofed an increasing amount of extractives on the surface already after the first measurement, both adhesives, PUR and MUF, showed no significant differences in their processing-time-dependent performance. Therefore the assumption of reduced bond strength and higher delamination due to a higher amount of extractives could not be verified in this study. This leads to the conclusion that the material does not have to be assembled within a given time frame after surface treatment with the used PUR and MUF systems.
- Authors BOKU Wien:
- Hansmann Christian
- Teischinger Alfred
- Find related publications in this database (Keywords)
- Teak (Tectona grandis L.f)
- extractives
- contact angle
- adhesives
- bonding strength
- wettability