Investigation of chemical changes in acetylated beech wood during weathering
M Akhtari, M Arefkhani
In this study Beech wood (Fagus orientalis) acetylated and has been subjected to a variety of artificial weathering conditions (water only, light only, water and light together)in difference times (0,50,150 and 300 h), then wood surface analyzed using Fourier Transform Infrared spectroscopy (FTIR).Results shown that weathering process affected the functional groups on the wood surface. Light and water, both acting together (full weathering) cause the greatest damage to the surface polymer structure and greatest chemical changes. The effect of light on the weathering process is quite rapid as monitored by FTIR spectroscopy within a few hours exposure (50 h).Changes observed in the infrared spectra of the surfaces after wood samples were subjected to water- only weathering are minor compared with the effect of light-only and water plus light. Acetylation of the wood under mild conditions servers to protect the surface from the weathering effect of light and water.