Summary of Tp, T50%, and Ea values from the DSC dynamic methods of Kissinger; Flynn–Wall; and Ozawa for l-lactide ROP using various initiators/initiating systems at heating rates of: 5, 10, 15, and 20 °C min−1.
| Initiators/initiating systems | Heating rate, β (°C min−1) | T p (°C) | T 50% (°C) | E a (kJ mol−1) | ||
|---|---|---|---|---|---|---|
| Kissingera | Flynn–Wallb | Ozawac | ||||
| Sn(Oct)2 | 5 | 142.0 | 141.8 | 57 | 65 | 61 |
| 10 | 157.8 | 157.0 | ||||
| 15 | 167.3 | 166.0 | ||||
| 20 | 176.0 | 173.0 | ||||
| Liquid Sn(OnC4H9)2 | 5 | 128.9 | 131.1 | 52 | 59 | 56 |
| 10 | 145.3 | 147.2 | ||||
| 15 | 150.8 | 152.5 | ||||
| 20 | 160.3 | 161.7 | ||||
| Sn(Oct)2/nC4H9OH | 5 | 139.2 | 138.8 | 60 | 67 | 64 |
| 10 | 152.3 | 151.7 | ||||
| 15 | 161.5 | 160.3 | ||||
| 20 | 170.0 | 169.0 | ||||
| Liquid Sn(OnC6H13)2 | 5 | 144.8 | 144.2 | 57 | 60 | 61 |
| 10 | 157.5 | 157.1 | ||||
| 15 | 170.0 | 167.3 | ||||
| 20 | 177.0 | 174.3 | ||||
| Sn(Oct)2/nC6H13OH | 5 | 148.8 | 148.5 | 61 | 67 | 66 |
| 10 | 160.0 | 159.0 | ||||
| 15 | 174.3 | 173.3 | ||||
| 20 | 179.3 | 178.0 | ||||
| Liquid Sn(OnC8H17)2 | 5 | 152.3 | 152.8 | 65 | 71 | 69 |
| 10 | 168.5 | 167.3 | ||||
| 15 | 175.5 | 175.8 | ||||
| 20 | 185.3 | 184.0 | ||||
| Sn(Oct)2/nC8H17OH | 5 | 160.3 | 158.3 | 71 | 74 | 72 |
| 10 | 169.3 | 168.0 | ||||
| 15 | 177.5 | 176.5 | ||||
| 20 | 187.0 | 186.7 | ||||
Kissinger: d[ln (β/Tp2)]/d(1/Tp) = −Ea/R = slope.
Flynn–Wall: log g(α) = log (Af(cat)Ea/R) − log β − 2.315 − 0.457 (Ea/RT50%), slope = −0.457 (Ea/R).
Ozawa: log β = constant − 0.4567 (Ea/RTp), slope = −0.4567 (Ea/R).