论文部分内容阅读
由准稀溶液速冷凝胶（冻胶）化结晶方法制备出超高分子量聚乙烯（ＵＨＭＷＰＥ）膜。对不同成膜浓度条件，以及再经不同温度（室温～１３０℃）热处理后所获得的膜，用小角Ｘ射线衍射方法及广角Ｘ射线衍射仪对称反射几何布置，观测了它们的片晶层积状结构及其形态的变化。结果表明，这种Ｃ轴垂直于膜面的片晶层积状形态结构与初始成膜浓度有关。发现在可达最大拉伸比的成膜浓度范围（０．４～０．５ｇ／１００ｍｌ）内，膜中片晶排列比较均匀规整。经１２９～１３４℃热处理后，随片晶厚化，片晶生长更趋完善，片晶层积长周期的周期性更好。同时，对在经不同温度热处理后接着拉伸的初期取向过程及形态结构的变化，由小角Ｘ射线衍射的结果也作了讨论。
Ultrahigh molecular weight polyethylene (UHMWPE) membranes were prepared by crystallization from a quasi-dilute solution by rapid cooling (gel). The film obtained after heat treatment at different film forming conditions and at different temperatures (room temperature ~ 130 ℃) was measured by small-angle X-ray diffraction method and wide-angle X-ray diffractometer with symmetrical reflection geometry. Like structure and its morphological changes. The results show that the C-axis perpendicular to the film surface lamella morphology and the initial film-forming concentration. It was found that within the film forming concentration range (0.4-0.5 g / 100 ml) up to the maximum draw ratio, the platelets in the film are arranged more uniformly and regularly. After the heat treatment at 129-134 ℃, the lamella growth is more perfect with the increase of plate thickness, and the periodicity of the long period of the lamellar lamella is better. At the same time, the results of the small angle X-ray diffraction are also discussed in the initial orientation process and the change of the morphological structure after the heat treatment at different temperatures and then stretching.