| abstract |
nickel-based catalyst composition. In general, the present invention provides a process for forming conjugated diene polymer, the process comprising the step of polymerizing the conjugated diene monomer in the presence of a catalytically effective amount of a catalyst composition formed by combining (a) a compound containing nickel, (b) an alkylating agent, (c) a fluorine-containing compound, (d) a carboxylic acid and (e) an alcohol. |