| 摘要 |
<p>Said catalyst has the general formula VX3, mAlX3, nZ, with X = halogen atom; Z = at least one saturated, branched or not, at least partially halogenated hydrocarbon; m is comprised between 0,1 and 10; and n is comprised between 1 and 300. In order to prepare said catalyst, the cogrinding of a vanadium halogenide VX2 and/or VX3 ( X = Hal), is carried out, with an aluminium halogenide AlX3, and there is added at least one halogenated hydrocarbon Z to the mixture obtained in proportions corresponding to the selected values of m and n. The invention also relates to the (co)polymerization of alpha-olefins, at 20-350 °C, in the presence of a catalytic system comprising at least one catalyst as defined hereabove and at least one organometallic activator.</p> |
