Polymerization and copolymerization of ethylene with higher alpha-olefins using metallocene catalysts with indenyl ligands

The kinetics of the polymerization and copolymerization of ethylene with 1- octene and 4-methyl-1-pentene initiated by five bis(indenyl) derivatives of metallocene catalysts differing by chirality and substituents in bridge gr oups was studied. The activity of the catalysts was found to depend on thei r structure and the temperature of polymerization. It was shown that high-m olecular-mass polymers may be prepared with a high yield at temperatures su itable from the technological viewpoint (70-80 degreesC). The thermal chara cteristics of the resulting polymers were determined by DSC.