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. 2020 Dec 8;10(71):43566–43578. doi: 10.1039/d0ra07635j

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
a

Friedman: ln (dα/dt) = ln (Af(α)) − (Ea/RT), slope = −Ea/R.

b

KAS: ln (β/T2) = ln [(AR)/Ea] − ln g(α) − Ea/RT, slope = −Ea/R.

c

OFW: ln β = ln [(AE)/R] − ln g(α) − 5.331 − 1.052 (Ea/RT), slope = 1.052 (−Ea/R).