Form parts made of elastomer material are used in most different products. Low friction coefficients and high wear resistance as well as low difference between static and dynamic contact with metallic surfaces. Friction blocks elastomer sliding on the metallic surface and reduces its using time. So it’s necessary to modify the friction properties of elastomer. The method of the activated Bromination unites the advantages of the surface modification by means of bromine and the cross-linking via electrons. The method is restricted to materials with double bonds (NBR)，but EPDM do not have enough double bonds .Atoms and molecules can directly be excited or ionized via high-energy electrons .The reactive species produced lead preferentially to the generation of radicals which can initiate complex chemical reaction in turn. The result of those chemical reactions depends on absorbed dose, chemical structure of the materials to be modified and treatment conditions（temperature ）. It is know, that in the result of those complex reactions polymer of changed molecule structure can arise.
This dissertation mainly investigates how friction properties of a polypropylene-EPDM-blend can be modified, by adding of PTFE micro-powder and electron treatment. Under 100KGy dose electron beam treatment, PP-EPDM-PTFE blends were crosslinked. There are three different ratio of blends，as PP-EPDM-50%:50% ，PP-EPDM-PTFE_47.5%:47.5%:5%, PP-EPDM-PTFE_45%:45%:10%.After modification, it has to be checked the friction coefficient on the metallic surface and wear resistance.
