METHOD FOR SYNTHESISING A COPOLYMER OF ETHYLENE AND 1,3-DIENE
The invention relates to a method for producing a copolymer of ethylene and a 1,3-diene of formula CH2=CR-CH=CH2, R being a hydrocarbon chain having between 3 and 20 carbon atoms, the ethylene units in the copolymer representing between 50 mol % and 95 mol % of the ethylene units and the units of the 1,3-diene present in the copolymer, and the units of the 1,3-diene with a 1,2 and 3,4 configuration in the copolymer representing more than 50 mol % of the units of the 1,3-diene present in the copolymer, said method comprising the polymerisation of ethylene and of the 1,3-diene in a reactor in the presence of a catalytic system at least containing one metallocene and one organomagnesium compound, ethylene and 1,3-diene being continuously added into the reactor during the polymerisation.