TECHNCIAL NOTE: Hardwood Species Bonding Properties After Cyclic Changes of Environmental Conditions: First Trials
Keywords:
beech, oak, cyclic changes, PVAc, UF, MUF, PUR,Abstract
The focus of this research was to investigate the bonding quality of the adhesives type after exposure to various moisture and temperature changes. This exposure was to simulate the changes in the interior application, which can cause problems in furniture manufacturing, especially with the usage of different adhesives. Different types of adhesives (Polyvinyl acetate (PVAc), Polyurethane (PUR), urea-formaldehyde (UF), and melamine-urea-formaldehyde (MUF)) were tested for bonding quality on two hardwood species; European beech (Fagus sylvatica L.) and English oak (Quercus roburL.). Bonding quality was tested based on EN13354 standard for control specimens, after 8 and 16 cycles of moisture and temperature changes. There was no statistical difference in bonding quality for the PVAc adhesive on beech and oak wood. PUR adhesive showed a significant decrease in the bonding quality of beech wood and no change in oak wood after exposure. The highest reduction in bonding quality after exposure cycles was found in the UF adhesive due to hydrolysis of the adhesive, regardless of the wood species. There was only reduction in the bonding quality for the MUF adhesive for beech wood after 16 cycles of the exposure condition.
References
Aydin I, Colakoglu G, Colak S, Demirkir C (2006) Effects of moisture content on formaldehyde emission and mechanical properties of plywood. Build Environ 41(10): 1311-1316.
Clauß S, Allenspach K, Gabriel J, Niemz P (2011a) Improving the thermal stability of one-component polyurethane adhesives by adding filler material. Wood Sci Technol 45(2):383-388.
Clauß S, Dijkstra DJ, Gabriel J, Klausler O, Matner M, Meckel W, Niemz P (2011b) Influence of the chemical structure of PUR prepolymers on thermal stability. Int J Adhes Adhes 31(6):513-523.
Dunky, M, Niemz, P (2002) Holzwerkstoffe und Leime. Springer-Verlag, Berlin Heidelberg, Germany.
George B, Simon C, Properzi M, Pizzi A, Elbez G (2003) Comparative creep characteristics of structural glulam wood adhesives. Holz Roh Werkst 61(1):79-80.
Ginzel W (1973) Zur frage der hydrolyse harnstoffharzgebundener holzspanplatten. Holz Roh Werkst 31(1):18-24.
Goulding T (1984) Wood adhesives: Chemistry and technology. Pages 320-350 in British Polymer Journal. Marcel Dekker, New York, NY.
Grigsby WJ, Ferguson CJ, Franich RA, Russell GT (2005) Evaluation of latex adhesives containing hydrophobic cores and poly(vinyl acetate) shells: Potential to improve poly(vinyl acetate) performance. Int J Adhes Adhes 25(2):127-137.
Hse CY, Fu F, Pan H (2008) Melamine-modified urea formaldehyde resin for bonding particleboards. For Prod J 58:56-61.
Ionescu M (2005) Chemistry and technology of polyols for polyurethanes. Smithers Rapra Press, Shrewsbury, England.
Jaffe HL, Rosenblum FM, Daniels W (1990) Handbook of adhesives, in I Skeist, ed. Springer US, Boston, MA.
Konnerth, J, Stockel, F, Muller, U, Gindl, W (2010) Elastic properties of adhesive polymers. III. Adhesive polymer films under dry and wet conditions characterized by means of nanoindentation. J Appl Polym Sci 118:1331-1334. DOI: 10.1002/app.32342.
Marutzky R (1994) Release of formaldehyde by wood products, Wood adhesives-chemistry and technology, in A Pizzi, ed. Marcel Dekker Inc., New York and Basel.
Myers GE (1982) Hydrolytic stability of cured urea formaldehyde resins. J Wood Sci 15:127-138.
No YB, Kim MG (2007) Evaluation of melamine-modified urea-formaldehyde resins as particleboard binders. J Appl Polym Sci 106(6):4148-4156.
Paiva NT, Henriques A, Cruz P, Ferra JM, Carvalho LH, Magalhães FD (2012) Production of melamine fortified urea-formaldehyde resins with low formaldehyde emission. J Appl Polym Sci 124(3):2311-2317.
Park B-D, Lee S-M, Roh J-K (2009) Effects of formaldehyde/urea mole ratio and melamine content on the hydrolytic stability of cured urea-melamine-formaldehyde resin. Eur J Wood Wood Prod 67(1):121-123.
Pizzi A (1994) Advanced wood adhesive technology. Marcel Dekker Inc., New York and Basel.
Ren D, Frazier CE (2012) Wood/adhesive interactions and the phase morphology of moisture-cure polyurethane wood adhesives. Int J Adhes Adhes 34:55-61.
Richter K, Pizzi A, Despres A (2006) Thermal stability of structural one-component polyurethane adhesives for wood—structure-property relationship. J Appl Polym Sci 102(6):5698-5707.
Ringena O, Janzon R, Pfizenmayer G, Schulte M, Lehnen R (2006) Estimating the hydrolytic durability of cured wood adhesives by measuring formaldehyde liberation and structural stability. Holz Roh Werkst 64(4): 321-326.
River BH, Ebewele RO, Myers GE (1994) Failure mechanisms in wood joints bonded with urea-formaldehyde adhesives. Holz Roh Werkst 52(3):179-184.
Robitschek P, Christensen RL (1976) Degradation phenomena in urea formaldehyde resin-bonded particleboard. For Prod J 26:43-46.
Simpson W, Tenwolde A (1999) Physical properties and moisture relations of wood, in Wood handbook—wood as an engineering material. Department of Agriculture, Forest Service. Forest Products Laboratory, Madison, WI.
Stoeckel F, Konnerth J, Gindl-Altmutter W (2013) Mechanical properties of adhesives for bonding wood—A review. Int J Adhes Adhes 45:32-41.
Troughton GE (1969) Accelerated aging of glue-wood bonds. J Wood Sci 1:172-176.
Vick CB (1999) Adhesive bonding of wood materials, in Wood handbook— wood as an engineering material. US Department of Agriculture, Forest Service. Forest Products Laboratory, Madison, WI.
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