Quasi-Static and Shock Compressive Response of Fluorinated Polymers: Kel-F 800

摘要

Fluoropolymers are widely used in a variety of applications due to their favorable properties that include chemical inertness, low coefficient of friction, and ability to withstand high-temperature operating conditions. Additionally, their high densities also make them desirable materials for use as high explosive binders in plastic bonded explosives. Here, we present the first investigation of the dynamic (shock) and static compression behavior of the fluorinated binder poly(chlorotrifluoroethylene-co-vinylidene fluoride) (Kel-F 800). Kel-F 800 samples prepared by both compression molding and melt-processing methods were studied. We observed little difference in the dynamic behavior of the two materials, despite a difference in crystallinity of 10–15%. A linear Rankine-Hugoniot fit to the Hugoniot loci in the Us-up plane gives U_s = 1.838 + 1.824 up. Langrangian sound velocities at pressure were also measured at 3.0 (c_L = 4.7 mm/μ) and 4.9 (c_L = 5.8 mm/μ) GPa.