1.The copolymer of oxygen and methyl methacrylate("peroxide") was purified through chromatography.2.The influence of the temperature and the additives upon the rate of the oxidation of MMA were studied.The free radical nature of the reaction was substantially proved.3.The rate of decomposition of the "peroxide" in solution was studied,and the activation energy of the unimolecular decomposition was indirectly calculated to be 22±l Kcal/mol.4.The "peroxide" has been used to initiate the polynerization of MMA.The polymer so obtained possessed very high molecular weight.