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用光学方法研究结晶高聚物的形变和流动过程称为流变光学(Rheo-opties)。通常研究结构用的光学方法与动态力学试验装置相结合,还可观察其动态形变过程中相应的结构变化。 X射线衍射法可以测定高聚物形变过程中晶粒的取向。我们发现:聚乙烯随拉伸程度的增长昌区的取向程度也增加,但晶区的取向滞后于非晶区的取向且随晶区取向的增加其非晶区的取向逐渐松弛。因此,
Optical methods to study the deformation and flow of crystalline polymers are called Rheo-opties. In general, the optical methods used to study the structure are combined with the dynamic mechanical testing device, and the corresponding structural changes in the dynamic deformation process can also be observed. X-ray diffraction can be used to determine the orientation of the grains during the deformation of the polymer. We found that the degree of orientation of polyethylene in Changxing area increases with the degree of stretching, but the orientations of the crystal regions lag behind those of the amorphous regions and the orientation of the amorphous regions gradually relaxes with the orientation of the crystalline regions. therefore,