Adhesives for Achieving Durable Bonds with Acetylated Wood.

ABSTRACT: Acetylation of wood imparts moisture durability, decay resistance, and dimensional stability to wood; however, making durable adhesive bonds with acetylated wood can be more difficult than with unmodified wood. The usual explanation is that the acetylated surface has fewer hydroxyl groups, resulting in a harder-to-wet surface and in fewer hydrogen bonds between wood and adhesive. This concept was evaluated using four different adhesives (resorcinol⁻formaldehyde, emulsion polymer isocyanate, epoxy, and melamine⁻formaldehyde) with unmodified wood, acetylated wood, and acetylated wood that had been planed. Strikingly, acetylation did not hinder adhesive bonds with a waterborne resorcinol⁻formaldehyde adhesive that bonded equally well to both unmodified and acetylated yellow poplar. An epoxy a

SUBMITTER: Frihart CR 

PROVIDER: S-EPMC6418570 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature