The Dielectric Properties of Wood IV : On Dielectric Dispersions of Oven-dried Wood

Abstract

In this paper, the dielectric absorptions of oven-dried wood were investigated. There existed three dielectric absorptions in wood. The position of dielectric absorption in high frequency range at low temperature coincided with that of viscoelastic one, and the relaxation process may be associated with the motion of CH_2OH groups in the disordered region of wood substances. The absorption of oven-dried KUSUNOKI appeared in low frequency range at room temperature may be due to the existence of the conductive material and was influenced by the shape of the material in wood. The absorption in very low frequency range at high temperature may be associated with the segmental motion of molecules in the amorphous region accompanied by thermal degradation.