Abstract
Polymethylmethacrylate and polyimide samples were irradiated with 500 keV carbon and hydrogen ions generated by a high intensity pulsed power ion beam source. Ion penetration was limited to a few microns at an energy deposition in the range of 0.1-5 J cm -2 and a dose rate of approx. 10 12 Gy s -1 during each pulse. Rapid energy deposition ( < 500 ns) resulting in a considerable temperature increase in the surface material was accompanied by the formation of gaseous radiolysis products. This led to a dramatic morphological change in which the surface region of the polymer was converted to a microcellular foam. Irradiation of polymers with high intensity ion beams appears to be a promising approach to the physical modification of the material surface.
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