The PUFF equation of state parameters for synthetic rubber

The PUFF EOS (equation of state) is widely used to describe the mixed state of materials (mixture of gas state and solid state), and the Hugoniot parameters, Grüneisen coefficient and the sublimation energy are key parameters in PUFF EOS. In this paper, the method to determine these parameters for synthetic rubber is presented. First of all, the Hugoniot parameters at low pressure range for synthetic rubber are measured by shock compression experiments as 1.23 km/s and 3.02. Then the Grüneisen coefficient and the sublimation energy for synthetic rubber are determined with a new inverse analysis method, i.e. they are derived via the comparison between the blow-off impulse and thermal shock wave value obtained from the electron beam radiation experiments and which obtained from numerical simulation with our computer code DRAM (Dynamic Response Analysis of Material) in the same conditions as the experiments, and the results are the Grüneisen coefficient 5.02, the sublimation energy 0.9 kJ/g. Finally, our results are proved reliable via the comparison between the Grüneisen coefficient value obtained from the Huang equation with the shock compression experiments and the Grüneisen coefficient value obtained from the inverse analysis method.