Effect of co-catalyst system on α-olefin polymerization with rac- and meso-[dimethylsilylenebis(2,3,5-trimethyl-cyclopentadienyl)]zirconium dichloride |
| |
Authors: | Naofumi Naga Kooji Mizunuma |
| |
Abstract: | Propene, 1-butene and 1-hexene polymerization was conducted with a mixture of rac- and meso-dimethylsilylenebis((2,3,5-tetramethyl-cyclopentadienyl))]zirconium dichloride (Me2Si(2,3,5-Me3Cp)2ZrCl2) ( 1 ) combined with methylaluminoxane (MAO), triethylaluminium (AlEt3)/triphenylcarbenium tetrakis(pentafluorophenyl)borate (Ph3CB(C6F5)4) ( 2 ) and triisobutylaluminium (AliBu3)/Ph3CB(C6F5)4, respectively, as co-catalyst systems. The ratios of polymerization rates Rp(rac)/Rp(meso) were changed with the combined cocatalysts. It was found that in the case of using trialkylaluminium/ 2 as co-catalyst Rp(rac)/Rp(meso) is lower than when using MAO in any kind of α-olefin polymerization. |
| |
Keywords: | |
|
|