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- W109096723 abstract "Recent research attention has focused on soybean-based adhesives because of increased phenolic resin prices and adhesive demand. Soybean-based adhesives have not been extensively used in industrial applications since 1960 s because of their poor water resistance and long curing time. This study was conducted to investigate the adhesive properties of crosslinked soy flour and/or soy hydrolyzate with phenol-formaldehyde (PF) resins for use in structural panels. Neutral phenolic soy (NPS) and alkaline phenolic soy (APS) resins were prepared and used to bond southern pine plywood. Adhesive bond quality of the soybean-based phenolic resins was evaluated by glueline shear test following the procedure detailed in Product Standard PS 1-95 for construction and industrial plywood. With NPS resins, higher bond quality of plywood panels was associated with increasing PF level and a viscosity of 160 centipoise (cps) PF resin. Addition of an extender and long assembly time had a negative effect on durability of the plywood panels. For APS resins, bond quality for plywood panels was enhanced with increased PF level and longer assembly time. However, it was necessary to add 19% corn-cob powder to the glue mix and to press at 200 °C to improve the bond quality with APS resins. Within the range of variable levels investigated, the following conditions produced higher wet wood failure than a control glue mix. For NPS resins best results were obtained with a 160 cps PF, a 30 minute assembly time, and no extender. For APS resins best results were obtained with a 50 cps PF, a 200 °C press temperature, 19% corn-cob powder, and a 60 minute assembly time. Comparable results were obtained with either a 40% or 50% PF level in the resins. Under these conditions, the wet wood failure of plywood bonded with both resins approached the" @default.
- W109096723 created "2016-06-24" @default.
- W109096723 creator A5085401541 @default.
- W109096723 date "2018-08-13" @default.
- W109096723 modified "2023-10-18" @default.
- W109096723 title "Soybean-based wood adhesives for structural panels" @default.
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- W109096723 doi "https://doi.org/10.31274/rtd-180813-8773" @default.
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