| abstract |
The invention relates to a catalytic system based on at least one metallocene and an asymmetric diorganomagnesium compound RB-Mg-RA, RB being different from RA and comprising a benzene ring substituted by the magnesium atom, one of the carbon atoms of the benzene ring in ortho of magnesium being substituted by a methyl, an ethyl, an isopropyl or forming a ring with the carbon atom which is its closest neighbor and which is in meta of magnesium, the other atom of carbon of the benzene ring ortho to magnesium being substituted by a methyl, an ethyl or an isopropyl, RA being an alkyl, a cycloalkyl or a benzyl, substituted or not. It increases the level of function in the synthesis of functional polymer. |