一、前言高聚物材料科学研究的中心问题之一是结晶层结构。从稀溶液或从熔融状态结晶的聚乙烯晶体,可能存在很多层状结构组织,在这些层的中心部位,分子键在三度空间作有规则的折迭排列,生成片层晶体结构。材料的力学性能很大程度上受层与层之间结合力的控制。目前测量高聚物结晶层厚度方法有多种,但各种方法都有一定的局 I. Introduction One of the central issues in the research of polymer materials science is the crystal layer structure. From dilute solutions or from crystalline polyethylene crystals, there may be many layers of structural organization in the central part of these layers, the molecular bonds in the three-dimensional space for a regular fold, resulting in lamellae crystal structure. The mechanical properties of materials are largely controlled by the binding forces between layers. There are many ways to measure the thickness of the polymer crystal layer, but there are some ways to do this