Table 1.
The formation of polyesters, polycarbonates, and copolymers using 1.
| Run | CHO | CL | CO2 | t [h] | % conv. [%][a] | Polymer | Mn (PDI) [g mol−1][b] |
|---|---|---|---|---|---|---|---|
| 1 | – | 500 | – | 16 | – | – | – |
| 2[c] | 20 | 200 | – | 2 | >99 | PCL | 11 780 (1.41) |
| 3 | 900 | 100 | – | 2 | >99 | PCL | 6020 (1.24) |
| 4 | 900 | 100 | 1 | 15 | 12 | PCHC | 1040 (1.08) |
| 5[d] | 900 | 100 | 1 | 21 | >99 (CL) 53 (CHO) | PCL-PCHC | 4810 (1.38) |
| 6[e] | 450 | 50 | 1 | 6.5 | 6 (CHO) >99 (CL) | PCHC-PCL | 3490 (1.48) |
| 7[e] | 450 | 50 | 1 | 4 2 | 10 (CHO) >99 (CL) | PCHC PCHC-PCL | 560 (1.29) 2350 (1.49) |
[a]
Determined by 1H NMR spectroscopy from the normalized integrals for resonances from CL (4.23 ppm), PCL (4.05 ppm), CHO (3.11 ppm), and PCHC (4.73–4.54 ppm).
[b]
Determined by SEC in THF, with a correction factor of 0.56 for PCL, as described in Ref. 16.
[c]
Polymerization in toluene, [CL]0=1 M.
[d]
CO2 added after complete consumption of CL (1 h), as monitored by ATR-IR spectroscopy.
[e]
CO2 removed after 3.5 h by application of six vacuum purge/nitrogen flush cycles.