Table 1.
Preparation and swelling ratios of poly(AN-co-MAA-co-NIPAM), poly(AN-co-MAA) and poly(AN-co-NIPAM) copolymers
| Molar ratio (%) (AN-MAA-NIPAM) | Molar ratio (%) (AN-MAA-NIPAM)a | Mw | Yield (%) | Swelling ratio (%) | Solubility (mg/mL) | |
|---|---|---|---|---|---|---|
| P(AN-MAA-NIPAM) | 50:25:25 | 47:23:30 | 2 000 | 89 | 65 | 12 |
| 25:50:25 | 25:52:23 | 2 000 | 61 | 72 | 14 | |
| 25:25:50 | 22:24:54 | 2 000 | 90 | 81 | 21 | |
| 50:25:25 | 49:26:25 | 20 000 | 82 | 62 | 5 | |
| 50:25:25 | 47:24:29 | 50 000 | 62 | 58 | ~1 | |
| P(AN-MAA) | 50:50:0 | 53:47:0 | 2 000 | 93 | 60 | 10 |
| P(AN-NIPAM) | 50:0:50 | 46:0:54 | 2 000 | 94 | 68 | 17 |
aDetermined by 13C-NMR