Hugoniot equation-of-state and structure of laser-shocked polyimide C22H10N2O5

The Hugoniot equation-of-state, Gruneisen parameter, and structure of laser-shocked polyimide were measured. The polyimide Hugoniots were measured in the pressure range 80-600 GPa and found to be consistent with the extrapolation of previously reported data below 60 GPa. The structural measurements of polyimide shock compressed to pressures of 28-163 GPa were performed using the in situ x-ray diffraction technique, and the results show that the melting pressure of polyimide along its Hugoniot is below 32(+/- 3) GPa, indicating that the discontinuous volume change of the polyimide Hugoniot at similar to 26 GPa observed in previous gas-gun experiments denotes the onset of melting. The consistency of the melting pressure between the previous gas-gun results and the present laser experiments suggests that the shock-melting process of polyimide is independent of the duration of the compression, revealing its rapid melting kinetics.

Automated summary

The Hugoniot equation-of-state, Gruneisen parameter, and structure of laser-shocked polyimide were measured. The results showed that the polyimide has a low melting pressure and rapid melting kinetics.