Mechanical Properties of Modified Wood

摘要

The aim of this paper is to examine the mechanical properties of wood modified with methacrylate of methyl group (MM). Methacrylate is a chemical substance used for wood protection against water soaking. Besides, one states that implantation of the methacrylate into the wood pores changes significantly wood's mechanical properties and increases its strength. The polymerized methacrylate forms a new composite with wood fibers of increased durability and smaller anisotropy than the natural wood. Through this modification, one eliminates not only the natural defects of wood but first of all increases its usable properties. The wood fibers effect the mechanical properties of the polymerized methacrylate better then other synthetic fibers. Authors' investigations prove that composites obtained on the basis of wood skeleton modified with methacrylate can be applied wherever a protection against magnetism, long working time in connection with elasticity and lightness, stability of dimensions, invariability of shape, ease machining and elements joining, good damping and vibration-isolation properties are required. Besides, the costs of production of such a composite are relatively low, in particular, when such popular and easy growing trees as pines, birches, poplars, asps or alders are use for modification. Application of wood-polymer composite to special constructions needs exact examination of its strength and other mechanical properties. This paper presents some such results obtained by authors.