Table 2.
Mn and Tg of copolymers P(1-co-LA)
| Entry | Ratio LA : 1 | Conv.a (%) | Polymer compositionb LA : 1 | Mnc calc. (×10−3) | Mnd NMR (×10−3) | PDIe | Tgf (°C) | |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 : 3 | 97 | 85g | 38 : 62 | 19.1 | 18.0 | 1.41 | 19.9 |
| 2 | 1 : 1 | 96 | 85g | 53 : 47 | 17.7 | 17.1 | 1.45 | 26.4 |
| 3 | 3 : 1 | 96 | 85g | 77 : 23 | 15.8 | 15.5 | 1.53 | 34.0 |
a
Determined by 1H NMR.
b
Calculated from 1H NMR.
c
g mol−1, calculated from [M]/[I] and corrected for conversion.
d
g mol−1, calculated from 1H NMR using end group analysis.
e
Measured by GPC in THF.
f
Determined by DSC.
g
Estimated conversions due to peak overlap in 1H NMR.