| abstract |
A method for polymerizing conjugated diene monomer into polydienes, the method comprising: polymerizing a conjugated diene monomer within a liquid phase polymerization mixture that includes a conjugated diene monomer, a lanthanide-based, dicyclopentadiene, or substituted dicyclopentadiene-based catalyst system, and optionally an organic solvent, with the proviso that the organic solvent, if present, is less than 20% by weight based on the total weight of the polymerization mixture. |