Investigation of epoxy-based wood adhesives |
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| Authors: | Seyyed Yahya Mousavi Jian Huang Kaichang Li |
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| Affiliation: | 1. Department of Wood Science and Engineering, Oregon State University, Corvallis, Oregon 97331;2. School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331 |
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| Abstract: | Cold-set epoxy-based wood adhesives were investigated for production of exterior plywood. Effective adhesives were composed of bisphenol A diglycidyl ether (BPADGE), polyamidoamine (PAA), and polyethylenimine (PEI). Three-ply plywood panels were prepared with BPADGE–PAA–PEI adhesives and evaluated for their strengths and water resistance in accordance with a standard for exterior plywood. The effect of BPADGE/(PAA + PEI) weight ratio, PAA/PEI weight ratio, the mixing time for preparing the adhesive, and the pressing time for making plywood panels on the water resistance and the shear strengths of the plywood panels was investigated. The pot life of the adhesive was also measured. Plywood panels made with the BPADGE–PAA–PEI adhesives met the industrial requirements for exterior applications. Adhesion mechanisms are discussed in detail. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47741. |
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| Keywords: | adhesives crosslinking mechanical properties resins thermosets |
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