EXPERIMENTAL STUDIES OF SHOCK COMPRESSED CARBOGAL PROPERTIES. EQUATIONS OF STATE OF CARBOGAL AND PLEXIGLASS
L. F. Gudarenko, M. V. Zhernokletov, S. I. Kirshanov, A. E. Kovalev, V. G. Kudelkin, A. I. Lomaikin, M. A. Mochalov, G. V. Siniakov, A. N. Shuikin
VANT. Ser.: Mat. Mod. Fiz. Proc. 2003. Вып.2. С. 52-62.
The paper presents experimental data for the properties of the earbogal organic compound C8F16 (perfluorine — 1,3-dimethyl cyclohexane) in high pressure and temperature region, in particular, data on single and repeated compression, temperatures and sonic speed. For plexiglass the data are given on shock compression of porous samples with initial density which is 10—60 times smaller than plexiglass density under standard conditions. Thermodynamically complete equations of state of earbogal and plexiglass have been developed using an earlier published model and well-known experimental data. The calculations with the developed equations of state of earbogal to P ≈ 70 GPa and of plexiglass throughout the studied range are shown to agree with obtained experimental data. Formally the equation of state of earbogal can be used at the density ρ < 300 g/cm3 or at the temperature T < 9,5-109 K and that of plexiglass at the density ρ < 20 g/cm3 or at the temperature T < 1,5 ⋅ 105 K. At density and temperature higher, than the above values an unstable region of thermodynamic equilibrium exists. A detailed description of the model and an accompanied constant of the equation of state allow a practical use of the paper results.
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