刨花板厚度方向变形研究 Ⅰ.尺寸稳定之化学热力学研究初步

THE STUDIES ON THICKNESS DEFORMATION OF WOOD COMPOSITE Ⅰ. The Pilot Study of Chemical Thermodynamics on the Dimension stabilizing in the Wood Composites

本文从化学热力学角度出发 ,理论上分析了人造板尺寸稳定的一些普遍性规律 ,初步证明人造板热压后在变形恢复时 ,蠕变和松弛将会同时发生 ;人造板的尺寸稳定过程是通过释放非膨胀功耗能量和膨胀功耗能量而实现的 ,只有使体系以非膨胀功耗能量释放 ,才能对人造板的尺寸稳定性有利 ;

This paper analyzed in theory some common rules about the stress releasing in wood composite based on chemical thermodynamics. It primary proved the creep and relaxation would concur during the stain recovery of wood composites after thermos pressing. It told that the release of internal stress in boards is by mains of discharging Non\|expansion\|work energy and expansion\|work energy. Only if the energy in boards system discharged by the way of Non\|expansion\|work, it would benefit the stability of boards system. And the study found the theoretical basis in chemical thermodynamics for the fact that hot\|stacking operation will improve the dimension's stability of wood composites.