Читать книгу Adhesives for Wood and Lignocellulosic Materials - R. N. Kumar - Страница 15

The structural hierarchy confers on wood very unique properties. Accordingly, wood is porous, permeable, hygroscopic, and orthotropic. It is a biological composite material of extreme chemical diversity and physical intricacy. Further, wood properties vary between species and even within the same species. They can vary even within a tree. Variability within a single species could be per se significant enough to throw challenge to an adhesive for its consistent and satisfactory performance [5].