Copolymerization of poly(propylene) macromonomer and ethylene with metallocene catalysts

Copolymerization of ethylene and poly(propylene) macromonomer(PPM) with Mn⇋710 was conducted with the (t‐butylamido)dimethyl(tetramethyl‐η 5 ‐cyclopentadienyl)silanetitanium dichloride(CGC‐Ti), ethylenebis(tetrahydroindenyl)zirconium dichloride(Et[IndH 4 ] 2 ZrCl 2 ), bis(cyclopentadienyl)zirconium dichloride(Cp 2 ZrCl 2 ) and bis(cyclopentadienyl)titanium dichloride(Cp 2 TiCl 2 ) catalysts using methylaluminoxane as cocatalyst. From the detail analysis of resulting copolymers by DSC, IR and 13 C NMR, it was proved that PPM is copolymerized with ethylene to give poly(ethylene‐co‐PPM). The ability of incorporating PPM in the copolymer was found to increase in the following order: Cp 2 ZrCl 2 «Cp 2 TiCl 2 < Et[IndH 4 ] 2 ZrCl 2 «CGC‐Ti.