Alcohol-initiated ROPs of l-lactide catalyzed by SnBipha performed in bulk at 160 °C/3 d with variation of the initiator (Lac/Cat = 1000/1).
| Exp. no. | Initiator | Lac/In | M n | M w | T m (°C) | ΔHm (J g−1) | Cryst. (%) | L (nm) | l c (nm) |
|---|---|---|---|---|---|---|---|---|---|
| 1Aa | EtLac | 100/1 | No cryst. | — | — | — | — | — | — |
| 1Bb | EtLac | 100/1 | 13 500 | 27 500 | 192.5 | 84.0 | 80 | 28 | 23 |
| 2 | EtLac | 300/1 | 37 500 | 77 000 | 195.5 | 83.5 | 79 | 30 | 24 |
| 3 | n-Butanol | 200/1 | No cryst. | — | — | — | — | — | — |
| 4 | 10-Undc | 100/1 | 20 000 | 42 000 | 190.5 | 84.5 | 80 | 25 | 20 |
| 5 | 10-Undc | 200/1 | 30 000 | 64 000 | 192.3 | 83.5 | 79 | 28 | 23 |
| 6 | 1-Hmnd | 100/1 | 19 000 | 42 500 | 188.5 | 87.0 | 82 | 26 | 21 |
| 7 | 1-Hmnc | 200/1 | 27 000 | 66 000 | 190.0 | 89.0 | 83 | 27 | 23 |
| 8 | 1,12-Dode | 200/1 | 29 500 | 68 500 | 190.2 | 84.0 | 77 | 30 | 23 |
| 9 | 1,12-Dode | 400/1 | 44 000 | 92 000 | 193.5 | 92.0 | 86 | 26 | 23 |
a
Ethyl lactate was added as 2 M solution in toluene.
b
Neat ethyl lactate was added.
c
10-Undecenol.
d
2-hydroxymethyl naphthalene.
e
1,12-Dodecane diol.