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‐η5‐cyclopentadienyl)silanetitanium dichloride(CGC‐Ti), ethylenebis(tetrahydroindenyl)zirconium dichloride(Et[IndH4]2ZrCl2), bis(cyclopentadienyl)zirconium dichloride(Cp2ZrCl2) and bis(cyclopentadienyl)titanium dichloride(Cp2TiCl2) catalysts using methylaluminoxane as cocatalyst. From the detail analysis of resulting copolymers by DSC, IR and 13C 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: Cp2ZrCl2 «Cp2TiCl2 < Et[IndH4]2ZrCl2 «CGC‐Ti.