Table 2.
Characteristics of mPEG-PLA synthesized polymers
| Weight ratio (w/w) mPEG:PLAa | 1H-NMR | DSC | |
|---|---|---|---|
|
| |||
| Weight ratio of mPEG to PLAb | Weight ratio of mPEG to PLAc | Melting point (°C) | |
| 60:40 | 64:34 | 61:39 | 48.8 |
| 50:50 | 45:55 | 48:52 | 43.6 |
| 40:60 | 37:63 | 38:62 | 41.0 |
Notes:
a
Weight ratio of mPEG to PLA was the actual weight ratio.
b
Weight ratio of mPEG to PLA was the weight ratio of mPEG to PLA calculated from 1H-NMR spectra.
c
Weight ratio of mPEG to PLA was the weight ratio of mPEG to PLA in the copolymers, calculated from DSC.
Abbreviations: DSC, differential scanning calorimetry; mPEG, methoxy poly(ethylene glycol); NMR, nuclear magnetic resonance; PLA, poly(lactide).