Table 2 Effect of AlR3 on ethylene/1-olefin copolymerization catalyzed by various catalytic systems

From: Effect of AlR3 (R = Me, Et, iBu) addition on the composition and microstructure of ethylene/1-olefin copolymers made with post-metallocene complexes of group 4 elements

Run Complex 1-olefin AlR3:Zr [mol/mol] Yield [g] Activity [kg/(molZr·h)] Mw [g/mol] Ð [O] (or [H]) [mol%]
11a (LigFI)2ZrCl2 1-hexene 1.845 147.6 nd nd 2.6
12a (LigFI)2ZrCl2 1-hexene 100/1 0.302 24.2 nd nd 7.6
13b Et(Ind)2ZrCl2 1-octene 0.505 1442.9 53000 2.8 2.5
14b Et(Ind)2ZrCl2 1-octene 100/1 0.138 394.3 38000 3.9 4.0
15c LigTiCl2 1.439 57.6 nd nd
16c LigTiCl2 1-octene 1.542 61.7 131200 1.3 4.0
17c LigTiCl2 1-octene 100:1 0.628 25.1 57500 1.4 4.7
18c,d LigTiCl2 1-octene 100:1 1.011 40.4 42900 2.0 5.0
19c LigTiCl2 1-octene 150:1 0.228 9.1 54900 1.4 nd
  1. nd not determined
  2. Copolymerization conditions: a0.025 mmol of (LigFI)2ZrCl2, 0.038 mmol of Ph3CB(C6F5)4, 0.375 mmol of AliBu3, AlR3 = AlMe3, 30 min, 5 bar of ethylene, 5 mL of 1-hexene, 60 °C; b0.7 μmol of Et(Ind)2ZrCl2, 5.0 mmol of MMAO, AlR3 = AlMe3, 50 °C, 30 min, 100 mL of toluene, 5 bar of ethylene, 5 mL of 1-octene; c0.050 mmol of LigTiCl2, 0.075 mmol of Ph3CB(C6F5)4, 0.75 mmol of AliBu3, AlR3 = AlMe3, 60 °C, 30 min, 5 bar of ethylene, 5 mL of 1-octene; dAlR3 = AlEt3