The present study is on the effect of gamma radiation on the electroconductivity of two polymer - matrix composite materials and their application. When the absorption dose came to the peak value dose 6 X 10(4)Gy, the electroconductivity of the graphite - PMMA composite materials reached a peak value of 14 s . m-1. The electroconductivity of the copper - PMMA composite material decreased with the increase of the absorption dose in the range of 4.0 X 10(4) to 7.5 X 10(4)Gy and then kept stable at about 2.5 X 10(-5) s . m-1. The two composite materials were analysed by infrared spectrum, microphotography and XPS. The two composite materials are of amosphous structure. The two composite materials show excellent properties of polarogram. They can be used in polarographic analysis as solid electrode. Graphite - polymethyl methacrylate can be powdered and mixed with plastics, rubber or coating as antistatic electric material.
