All procatalysts show high activities toward ethylene polymerization in the presence of MAO. The procatalysts bearing substituted cyclopentadienyl groups give higher activity, while the use of stronger electron-donating groups of arylamidates enhances the catalytic activities of the corresponding procatalysts. It is likely there is a single active species above 40℃, which produces PEs with narrow molecular weights. Regarding the results with procatalyst C6, the copolymerization of ethylene with 1-hexene or 1-octene produced copolymers incorporating branching of about 15%.

The detailed report of the work was published in Organometallics (Organometallics, Vol. 29, No. 11, 2010).

Abstract of the paper published in Organometallics