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利用结晶聚合物的“三相结构”模型计算了结晶聚合物的一维电子密度相关函数 ,结论是三相模型的片层厚度和不变量与两相结构的意义不同 .利用计算结果分析了一批样品的结构参量 ,发现用Ruland方法得到的结晶过渡层的厚度与用一维电子密度相关函数的结果是一致的 .用Bragg定律求出的结晶聚合物的长周期与相关函数法长周期相差很多 .这是因为两种分析结晶过渡层厚度的方法都是以样品电子密度的不均匀区为基础的 ,本质是一致的 .但是Bragg法的长周期与相关函数法的长周期代表的范围不同 .
The one-dimensional electron density correlation function of crystalline polymers was calculated by using the “three-phase structure” model of the crystalline polymer. The conclusion is that the three-phase model has different meanings of layer thickness and invariant from the two-phase structure. It is found that the thickness of the crystalline transition layer obtained by Ruland method is consistent with the one-dimensional electron density correlation function.The long period of the crystalline polymer obtained by Bragg’s law is different from that of the correlation function method This is because the two methods for analyzing the thickness of the crystalline transition layer are based on the inhomogeneous region of the sample electron density and are essentially the same, but the long period of the Bragg method and the correlation function method represent different ranges .