Effect of thermal modification on the stress relaxation behavior and microstructure of the cell wall

Abstract The stress relaxation behavior and cell wall microstructure of sugi were evaluated after thermal modification. Stress is observed has a broad spectrum, implying various mechanisms. was analyzed using stretched exponential function, namely, the Kohlrausch–Williams–Watts (KWW) which contains two parameters. Moreover, structure amorphous phase in examined by small-angle X-ray scattering (SAXS) analysis mass fractal dimension. variation spectrum reduced, specific time increased modification at 220 °C. dimension SAXS owing to modification, indicating that includes some defects between cellulose microfibrils. related parameter KWW function. Considering change crystallinity, decomposed condensed decomposition, caused longer time. Thus, function may be used evaluate wood, can indicate wall.