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作 者 ：阮锡根 王婉华 潘彪

期 刊 ：林业科学 1993年 29卷 6期 页码：531-536

关键词：X射线衍射；应力木；纤丝角；

Keywords:X-ray diffraction, Reaction wood, Microfibril angle,

摘 要 ：论证了用X射线(002)衍射图谱测量木材平均纤丝角的方法,并解释了前人用分峰法测得的纤丝角偏小的原因。在此基础上对马尾松应压木和69杨应拉木进行测试,对测得的各种形状的(002)衍射图谱进行合理解释。测试结果给出了不同区域不同年轮的纤丝角值。并且,实验测量了纤丝角和纵向抗拉强度的关系。结果表明,用X射线(002)衍射图谱可以断定胶质层的存在与否,S₁和S_{2层的厚度比例。此外,纤丝角值是反映木材纵向抗拉强度的重要指标,两者呈线性关系。}

Abstract:This paper demonstrates strictly the method of measuring mean microfi-bril angles of wood by using X-ray (002) diffractograms, It also explainswhy the microfibril angles mesured before by separation were smaller thanmeasured by other methods, based on recent method, we measured Masson pineand I-69 Poplar, and explained reasonably various shapes of diffractograms,the value of microfibril angles with different annual rings in different zonesof reaction wood is determined, the relationship between microfibril angleand longitudinal tensile strength is also surveyed, diffractograms can be usedto determine the possible existance of g-layer as well as the ratio of thickn-ess between S₁、S₃ and S₂ layers, moreover microfibril angle is an importantfactor reflecting longitudinal tensile strength of wood, while the former islinearly dependent upon the latter.

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