The time ranges of the fracture of polymethylmethacrylate and polystyrene during the action of a shock wave generated by a high current pulsed electron beam are experimentally determined using laser probing in combination with electron-optical chronography. It is shown that fractures occur during unloading of a material, i.e., after the passage of the shock wave. Although the characters of fracture of these polymers near the surface irradiated by electron beam are different, the fracture wave velocities in them are found to be close.
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