【摘要】 木材在机械力或光辐射作用下,由于高聚物分子共价键的断裂而产生自由基,从而使木材表面具有某些新的化学特征。本文用电子自旋共振波谱(ESR)考察了在机械切削和光辐射过程中木材自由基的形成与变化规律,并就木材自由基的类别、自由基与胶粘剂之间的作用以及木材光化学反应机理作了分析和讨论。更多还原

【Abstract】 It has been known that’ the mechanical preparation of wood surfaces or exposure of them to the ordinary atmosphere will induce free radical formation due to molecular fractures of wood chemical components. Thus, mechanical or photochemical actions may lead. to the modification of wood surface characteristics both chemically and physically. The present paper is dealing with some results of ESR investigation of free radical formation and decaying behaviors in the processes of wood cutting and photo-irradiations. Attempts are made to the identification of those free radicals and their reactivities with adhesives and the mechanism of photo-chemical reactions of wood are also discussed.更多还原