Table 1.
Catalyst, monomer, and chain transfer agent influence on polymerization characteristics.
| Chain Transfer Agent (-OH) | BGE : Catalyst : -OH | TOF (h−1) | Polymer Selectivity | Mn (NMR) | Mn (theoretical) | Mn (GPC) | Ð |
|---|---|---|---|---|---|---|---|
| mPEG, 1.9k | 2000:1:40 | 570 | >99% | 5.9k | 5.9k | 4.3k | 1.03 |
| 2000:1:20 | 600 | >99% | 11.1k | 12.4k | 8.8k | 1.02 | |
| 2000:1:10 | 630 | >99% | 24.9k | 26.0k | 13.1k | 1.04 | |
| mPEG, 5.0k | 2000:1:20 | 580 | >99% | 14.5k | 16.3k | 9.9k | 1.03 |
| mPEG, 10.0k | 2000:1:20 | 370 | >99% | 10.5k | 14.0k | 13.6k | 1.25 |
| benzyl alcohol | 2000:1:40 | 630 | >99% | 6.0k | 6.4k | 6.8k | 1.03 |
| 2000:1:20 | 670 | >99% | 13.6k | 13.6k | 9.3k | 1.03 | |
| 4000:1:40 | 630 | >99% | 12.6k | 12.4k | 9.4k | 1.04 | |
| polystyrene, 6.0k | 2000:1:20 | 580 | >99% | 14.7k | 12.1k | 10.3k | 1.04 |
| 2000:1:13 | 558 | >99% | 19.6k | 17.3k | 11.3k | 1.04 |