四氟乙烯与六氟丙烯共聚物(FEP)是一种热塑性的全氟高聚物,它在现代工业和科学技术上有着广泛而又重要的应用。文献上曾对此共聚物的组成和热裂解过程进行了不少研究,然而所有这些报道都从未涉及此共聚物分子中是否存在聚四氟乙烯链段和它在共聚物中所占的比例;文献中所提出的机制也未能很好地说明实验结果。 Tetrafluoroethylene and hexafluoropropylene copolymer (FEP) is a thermoplastic perfluoropolymer, it has a wide range of important applications in modern industry and science and technology. Many studies have been made on the composition and thermal cracking process of this copolymer in the literature. However, all these reports have never involved the presence or absence of polytetrafluoroethylene segments in the copolymer molecule and its proportion in the copolymer The mechanism proposed in the literature also failed to explain the experimental results well.