Summary of Ea ranges from DSC isoconversional methods for ROP of l-lactide using various initiators/initiating systems at heating rates of 5, 10, 15, and 20 °C min−1.
| Initiator/initiating system | E a range (kJ mol−1) | ||
|---|---|---|---|
| Friedmana | KASb | OFWc | |
| Sn(Oct)2 | 58–63 | 59–74 | 63–77 |
| Sn(OnC4H9)2 | 53–60 | 55–58 | 60–62 |
| Sn(Oct)2/nC4H9OH | 56–63 | 56–64 | 60–67 |
| Sn(OnC6H13)2 | 56–61 | 56–60 | 60–64 |
| Sn(Oct)2/nC6H13OH | 60–63 | 63–71 | 67–74 |
| Sn(OnC8H17)2 | 66–76 | 66–72 | 70–76 |
| Sn(Oct)2/nC8H17OH | 68–81 | 65–74 | 69–78 |
Friedman: ln (dα/dt) = ln (Af(α)) − (Ea/RT), slope = −Ea/R.
KAS: ln (β/T2) = ln [(AR)/Ea] − ln g(α) − Ea/RT, slope = −Ea/R.
OFW: ln β = ln [(AE)/R] − ln g(α) − 5.331 − 1.052 (Ea/RT), slope = 1.052 (−Ea/R).