聚全氟乙丙烯(F_s-46)是四氟乙烯(TFE)与六氟丙烯(HFP)的共聚物。McCrum用扭摆法测得α和β转变与HFP含量有关。Eby等用超声波法发现γ松弛也与HFP含量有关。 本文用动态力学法发现HFP含量对α、β、γ转变都有影响。用介电方法得到了α、γ、δ三个转变峰。δ峰属于端基运动,Eby等认为是—CF_2H基运动;我们从红外光谱图中检测到—COOH基的存在,认为与—COOH基运动也有关。 Poly-F-propylene (F_s-46) is a copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). McCrum measured by twist method α and β changes and HFP content. Eby and other ultrasound found that γ relaxation and HFP content. In this paper, we found that HFP content affects the transformation of α, β, γ by dynamic mechanics. By dielectric method, three transition peaks of α, γ and δ were obtained. δ peak belongs to the terminal movement, Eby and so that is -CF_2H-based movement; we detected the presence of -COOH group from the infrared spectrum that is related to -COOH-based movement.