小角x射线散射结晶聚合物过渡层厚度的测定

Determination of the transition-layer thickness of a crystalline polymer by using small-angle x-ray scattering

由于结晶聚合物中的过渡层是弥散的 ,而修正的Porod定律是解决这种问题的有效方法之一 .把相关函数法和Porod定律法求结晶聚合物的过渡层厚度进行了比较 。

The thickness of transition layer of a crystalline polymer is generally calcu lated by one_dimensional electron density correlation function. If the transitio n layer of the crystalline polymer is diffusive, the corrected Porod's law is an effective method to deal with the diffuse transition layer of pseudo two_phase material. The method of Porod's law is used to compute the thickness of transiti on layer of crystalline polymer and compared with that of correlation function. The conclusion is that the two methods obtain identical thickness of the transit ion layer.