Fine Structures of Some Major Softwoods and Hardwoods by X-ray Diffraction Methods

X선회절법(線回折法)에 의한 주요(主要) 침·활엽수재의 미세구조(微細構造) 해석(解釋)

Fine structures of some Korean woods were investigated by X-ray diffraction methods. Relative crystallinity measured by the Segal's method and by the area method was $53{\pm}6%$ and $43{\pm}8%$ in softwoods, and $54{\pm}5%$ and $45{\pm}5%$ in hardwoods, respectively. The crystallite dimension in width was $3.11{\pm}0.45nm$ in softwoods and $3.22{\pm}0.25nm$ in hardwoods. In the longitudinal direction, the dimension was $12.79{\pm}0.89nm$ in softwoods and $12.60{\pm}0.72nm$ in hardwoods. The d-spacings of (200) in equatorial and (004) in meridional layers were about 0. 397 run and about. 0.260 nm, respectively. As a result, relative crystallinity, crystallite dimensions and d-spacings of (200) did not show any differences between the softwoods and hardwoods. The ratio of integrated intensities of (002) and (004), however, showed some differences between the softwoods and hardwoods. Namely, it was $0.101{\pm}0.027$ in softwoods and $0.138{\pm}0.037$ in hardwoods.