GPC-derived molar masses and dispersities and optical rotation of some PLLA samples.
| Polymer | M n (GPC) [g mol−1] | M w (GPC) [g mol−1] | Đ (GPC) | [α]D22[°] |
|---|---|---|---|---|
| PLLA-EAA | 14 100 | 14 700 | 1.04 | −153 |
| PLLA-DEAA | 14 500 | 15 000 | 1.04 | −154 |
| PLLA-DMAA | 12 200 | 13 000 | 1.06 | −150 |
| PLLA-ureaa | 3240 (bimodal) | 5600 | 1.72 | −147 |
| PLLA-TMU | 12 500 | 14 400 | 1.16 | −151 |
a
Some (l-LA)2 monomer was lost from the melt reaction by sublimation to the neck of the flask. Mn: number-average molar mass, Mw: weight-average molar mass, Đ: dispersity, [α]D22: specific optical rotation at 589 nm and 22 °C.