Equation of State of Polytetrafluoroethylene for Calculating Shock Compression Parameters at Megabar Pressures
A. M. Molodets, D. V. Shakhrai, A. S. Savinykh, A. A. Golyshev, V. V. Kim
Institute of Problems of Chemical Physics, 142432 Chernogolovka
Keywords: shock-wave compression, polymers, Grüneisen coefficient, equation of state
Abstract
Semi-empirical equations of state (thermal and caloric) are obtained to calculate not only the kinematic parameters (shock wave velocity, particle velocity, reverberation of waves) but also the thermodynamic parameters (temperature, pressure, compression) of monolithic and porous polytetrafluoroethylene at high shock pressures. The equations of state are used to model wave interaction in shock-wave experiments using the developed hydrocode. The equations are verified by comparison simulation results with published results of experiments and the data of our shock compression tests of solid and porous samples of PTFE in the range of 10–170 GPa.
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