Table 2. Structural Parameters of PGS Prepared Using Different Amounts of Enzyme and Sebacic Acid/Glycerol Feed Ratios in Acetone at 40 °C for 24 h.
|
yi (%)a |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| [enzyme] (wt %) | molar feed ratio | Mn (kDa)a | Mw (kDa)b | Đb (Da) | DB (%) | 1T | 2T | 1,3L | 1,2L | 1,2,3D |
| 13.6 | 1.0/1.0 | 9.4 | 16 | 6.8 | 41 | 19 | 3 | 41 | 17 | 20 |
| 10.2 | 1.0/1.0 | 5.4 | 11 | 5.8 | 41 | 22 | 2 | 40 | 16 | 20 |
| 6.8 | 1.0/1.0 | 3.7 | 13 | 4.5 | 36 | 22 | 2 | 44 | 15 | 16 |
| 3.4 | 1.0/1.0 | 1.4 | 3 | 2.1 | 17 | 30 | 2 | 53 | 9 | 6 |
| 13.6 | 1.5/1.0 | n.d.c | 11 | 4.8 | 56 | 8 | 0 | 44 | 12 | 36 |
| 13.6 | 1.2/1.0 | n.d.c | 8 | 4.0 | 54 | 15 | 1 | 37 | 16 | 31 |
| 13.6 | 1.0/1.2 | n.d.c | 7 | 3.1 | 28 | 31 | 3 | 39 | 16 | 11 |
| 13.6 | 1.0/1.5 | n.d.c | 3 | 1.7 | 17 | 44 | 6 | 33 | 13 | 5 |
a
Determined by 1H NMR.
b
Determined by GPC.
c
n.d. = not determined.