Table 3. Optimization of the Polymerization Conditions Using Ni1/MAOa.
| run | T (°C) | t (min) | Al/Ni | PE (g) | activityb | Mwc | Mw/Mnc | Tm (°C)d |
|---|---|---|---|---|---|---|---|---|
| 1 | 30 | 30 | 1500 | 5.64 | 5.64 | 7.13 | 2.0 | 85.4 |
| 2 | 30 | 30 | 2000 | 6.87 | 6.87 | 9.21 | 2.0 | 94.7 |
| 3 | 30 | 30 | 2500 | 7.93 | 7.93 | 9.35 | 2.3 | 92.7 |
| 4 | 30 | 30 | 3000 | 6.81 | 6.81 | 8.59 | 2.3 | 89.7 |
| 5 | 30 | 30 | 3500 | 5.78 | 5.08 | 7.93 | 2.2 | 86.5 |
| 6 | 20 | 30 | 2500 | 4.48 | 4.48 | 15.19 | 2.4 | 104.8 |
| 7 | 40 | 30 | 2500 | 5.31 | 5.31 | 5.35 | 2.1 | 69.8 |
| 8 | 50 | 30 | 2500 | 2.06 | 2.06 | 4.30 | 2.0 | 62.6 |
| 9 | 30 | 05 | 2500 | 1.21 | 7.25 | 7.44 | 2.2 | 85.7 |
| 10 | 30 | 15 | 2500 | 3.76 | 7.52 | 7.89 | 2.3 | 96.1 |
| 11 | 30 | 45 | 2500 | 10.04 | 6.69 | 10.63 | 2.5 | 97.0 |
| 12 | 30 | 60 | 2500 | 11.15 | 5.58 | 12.43 | 2.5 | 101.0 |
| 13e | 30 | 30 | 2500 | 2.80 | 2.80 | 5.73 | 2.2 | 68.8 |
| 14f | 30 | 30 | 2500 | trace | trace |
Conditions: 2.0 μmol Ni1, 100 mL toluene, and 10 atm of C2H4.
106 g of PE (mol of Ni)−1 h–1.
Mw: kg mol–1, determined by GPC.
Determined by DSC.
5 atm of C2H4.
1 atm of C2H4.