The results of copolymerization of ethylene with 1-octene using (F-salalen)TiCl2 in the presence of MAOa.
| Entry | Al/Ti (mol mol−1) | T p (°C) | 1-Oct. feed (mol L−1) | Activityb | M w c ×10−6 | M w/Mnc | T m d (°C) | ΔHd (J g−1) | X c d (%) | 1-Oct. cont.e (mol%) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 600 | 50 | 0 | 56.5 | 2.64 | 2.4 | 134.6 | 204.5 | 69.8 | 0 |
| 2f | 600 | 50 | 1.2 | n.d | — | — | — | — | ||
| 3 | 600 | 30 | 1.0 | 35.6 | 1.89 | 2.1 | 125.0 | 177.3 | 60.5 | 0.9 |
| 4 | 600 | 40 | 1.0 | 42.0 | 1.23 | 2.2 | 124.1 | 141.0 | 48.1 | 1.8 |
| 5 | 600 | 50 | 1.0 | 92.3 | 0.87 | 2.6 | 119.4 | 80.6 | 27.5 | 3.1 |
| 6 | 600 | 70 | 1.0 | 141.0 | 0.22 | 3.2 | 120.5 | 85.3 | 29.1 | 2.0 |
| 7 | 600 | 90 | 1.0 | 101.2 | 0.10 | 3.9 | 120.9 | 136.9 | 46.7 | 1.9 |
| 8 | 200 | 50 | 1.0 | 63.5 | 1.64 | 1.9 | 123.5 | 101.1 | 34.5 | 2.0 |
| 9 | 400 | 50 | 1.0 | 87.0 | 1.24 | 2.1 | 123.3 | 83.8 | 28.6 | 2.6 |
| 10 | 800 | 50 | 1.0 | 35.0 | 0.57 | 3.4 | 123.5 | 101.4 | 34.6 | 2.2 |
| 11 | 600 | 50 | 0.2 | 79.8 | 1.26 | 2.7 | 128.7 | 172.1 | 58.7 | 1.2 |
| 12 | 600 | 50 | 0.4 | 127.5 | 1.00 | 2.9 | 124.4 | 160.6 | 54.8 | 1.7 |
| 13 | 600 | 50 | 0.8 | 132.5 | 0.89 | 2.6 | 122.3 | 92.2 | 31.5 | 2.8 |
| 14 | 600 | 50 | 2.0 | 64.0 | 0.78 | 2.7 | 117.9 | 65.8 | 22.5 | 6.4 |
Polymerization conditions: catalyst, 20.0 μmol; ethylene pressure, 15 atm; total volume, 70 mL; reaction time, 30 min.
103 g polymer (mol Ti)−1 h−1.
g mol−1, determined by HT-GPC in 1,2,4-TCB versus polystyrene standard.
Determined by DSC at a heating rate of 10 °C min−1 and used the second heating curves.
1-Octene incorporation (mol%) estimated by 13C NMR spectra.
1-Octene homopolymerization, ethylene pressure, 0 atm.