聚四氟乙烯是一种性能良好,使用颇为广泛的工程塑料。它有较高的结晶度,并有多种结晶形态。这些结晶形态除与聚四氟乙烯大分子链的性质、分子量等密切有关外,还受外界条件的影响而有所变化;这些晶形又密切影响着材料的力学性能。高聚物的行为,毕竟不是单一高分子的行为,而是大量高分子聚集体的综合表现。研究高分子的聚集态及其与外界条件的关系,对于聚合物材料的加工和 PTFE is a good performance, the use of quite a wide range of engineering plastics. It has a higher degree of crystallinity, and a variety of crystalline forms. These crystal forms are closely related to the nature and molecular weight of the polytetrafluoroethylene macromolecule chains, and are also affected by the external conditions. These crystal forms closely influence the mechanical properties of the material. The behavior of polymers, after all, is not a single polymer behavior, but the comprehensive performance of a large number of polymer aggregates. Study of polymer aggregation and its relationship with the external conditions, the processing of polymer materials and