乙烯和四氟乙烯等克分子交替共聚物是一种重要的含氟塑料,由于它具有较高的熔点、优良的力学及电学性能,使得它在国防及民用方面都具有特殊的用途。这种共聚物是属于斜方或单斜晶系,其晶胞参数a=9.6(?)、b=9.25(?)、c=5.0(?)、r=96°。这种等克分子交替共聚物的x 射线衍射图有两个主要衍射峰,其位置分别为2θ=19.63°、21.00°;晶面间距d=4.52(?)、4.23(?)。判别一种共聚物的性能,结晶度也是一个主要指 The alternating copolymer of ethylene and tetrafluoroethylene is an important fluorine-containing plastic. Because of its high melting point, excellent mechanical and electrical properties, it has special applications in defense and civil applications. This copolymer belongs to the rhombic or monoclinic system with unit cell parameters a = 9.6 (?), B = 9.25 (?), C = 5.0 (?), R = 96 °. There are two main diffraction peaks of the XRD pattern of the copolymer with the same molecular weight of 2θ = 19.63 ° and 21.00 °, respectively. The interplanar spacings d = 4.52 (?) And 4.23 (?), Respectively. Judging the performance of a copolymer, the degree of crystallinity is also a major means