非晶化木材の材質(<小特集>木質材料小特集)

概要

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In this report, wood was decrystallized at 25℃, 40℃ and 60℃ by using a non-aqueous solvent, that is a dimethylfoxide-chloral mixure, and the relationship between the degree of crystallinity and the dynamic modulus of elasticity of decrystallized wood was examined. The results obtained are summarized as follows. (1) Small changes in dimension, weight and density of woodwere observed in the process of decrystallization. (2) The degree of crystallinity and the dynamic modulus of elasticity decreased with increasing treated day. Their decreasing rates were accelerated as the temperature at decryatllizing process was raised. (3) The apparent activation energy for the decrystallizationwas estimated roughly by the reaction kinetics. The values calculated from the decrease in the degree of crystallinity and in the modulus of elasticity were about 4〜8 kcal/mol. Since there is no difference between these two activation energies, it may be considered that the modulus of elasticity of the decrystallized wood is closely related to teh degree of crystallinity of wood.
社団法人日本材料学会の論文
1992-02-15