Investigation of Bonding Performance of Polyurethane (Pur) Based Adhesives to Different Climate Conditions

Abstract

This study was carried out to determine suitable wood type and glue to be used in wet-hot places (in the construction of saunas, baths and various marine vehicles), to determine the changes in adhesion performance at variable temperatures and sequential and individual processes by keeping the relative humidity constant in these areas. For this purpose, as wood material, Scotch pine (Pinus sylvestris Lipsky) and stemless oak (Quercus petrea spp.), glue as polyurethane based PA300 and PA301 adhesives were preferred. Wood material was supplied by random method.
Test results in terms of bonding strength; sequential process adversely affected and decreased by 7 percent compared to the individual process. As wood type, 14 percent higher resistance was obtained in pine than oak.
In terms of elasticity modulus; sequential process negatively affected and decreased by 1.4 percent compared to the individual process. As wood type, it was 10.5 percent with respect to oak, and 32.6 percent with higher elasticity than PA300 glue as glue type. In terms of elongation deformation in glue line; the sequential process adversely affected and reduced by about 19 percent compared to the individual process.

Keywords

• wood
• oak
• Scotch pine
• adhesion
• climatic conditions
• PUR-based adhesives

References

1. [1] Pizzi, A., “Wood adhesives: chemistry and technology”, 1st ed.; Marcel Dekker, New York, Vol. 12. (1983).
2. [2] Skeist, I., “Handbook of adhesives”, 1st ed.; Van Nostrand Reinhold, New York, Vol. 669, (1962).
3. [3] Packham, D., E., “Handbook of adhesives”, 1st ed.; Longman, London, Vol. 407, (1992).
4. [4] Ors, Y., Ozcifci, A., and Atar, M., “Bonding Strengthes of Klebit 303, Kleıberit 305.0 and Super-Lackleim 308” Adhesives, Turk Journal Agriculture, 23, 757. (1999).
5. [5] White, J., T., “Market trends for wood adhesives”, Adhesives Age, 19, 454. (1981).
6. [6] Myres, G., E., “New technological and materials for bonding wood products”,Adhes Age, 26, 747, (1988).
7. [7] Ebewele, R., O., River, B., H., and Myres, G., E., “Urea-formaldehyde (UF) adhesive resins of wood”, Adhesive Age, , 49, 229, (1993).
8. [8] Freeman, G., G., Krebich, K., “Estimating durability of wood adhesives in Vitro”, Forest Products Journa,. 18, 39, (1968).

9. [9] Tranghton G., E., and Chow, S., “Accelerated aging of glue-wood bonds”, Journal of the Institute of Wood Scienc,. 21:29, (1968).
10. [10] Dinwoodie J., M., “The properties and performance of particleboard Adhesives”, Journal of the Institute of Wood Science, 8:59, (1978).
11. [11] John, N., Joseph, R., “Rubber solution adhesives for wood to wood bonding”, Journal Applied Polymer Science, Vol: 68/7, 168, 1185, (1998).
12. [12] Osrekar, U., Malavasic, T., “Adhesion and adhesives”, International Journal of Adhesion and Adhesives 112, 38, (1992).
13. [13] Oertel, G., “Polyurethane”, Polyurethane Handbook, Hanser Publishers: New York, (1985).Vick, C.B. and Okkonen, E.A. (1998) Strength and Durability of One-Part Polyure- thane Adhesive Bonds to Wood. Forest Products Journal, 48
14. [14] Vick, C., B., and Okkonen, E., A., “Strength and durability of one-part polyurethane adhesive bonds to wood” Forest Products Journal, 48, 71, (1998).
15. [15] Sandip, D., D., Petal, J., V., and Sinha, V., K., “Adhesion and adhesives”, International Journal of Adhesion and Adhesives, 23, 393, (2003).
16. [16] Uzun et al.,. “Bonding strength of some adhesives in heat-treated hornbeam (Carpinus betulus L.) wood used for ınterior and exterior decoration”, BioResources, 11(3), 7686-7696, (2016)
17. [17] DIN EN 204, “Classification of thermoplastic wood adhesives for non-structural applications”, (2016).
18. [18] http://www.apeltutkal.com/betakimya.com.tr/. (Retrieved: 28.01.2019).
19. [19] Kägi, A.; ·Niemz, P.; Mandallaz, D.: Einfluss der Holzfeuchte und ausgewählter technologischer Parameter auf die Verklebung mit 1K-PUR Klebstoffen unter extremen klimatischen Bedingungen. Holz als Roh- und Werkstoff (2006) 64: 261–268
20. [20] BS EN 205, “Adhesives. Wood Adhesives for non-structural applications. Determination of tensile shear strength of lap joints”, (2016).