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| entry | DA/CS2 (molar ratio) | DA (mmol) | T (°C) | time (h) | yield of PTU (%) | Mw (kg/mol) | Đ |
|---|---|---|---|---|---|---|---|
| 1 | 1:5 | 10 | 45 | 5 | 58.8 | 2.14 | 1.44 |
| 2 | 10 | 45 | 24 | 83.3 | 5.43 | 1.27 | |
| 3 | 2:3 | 10 | 45 | 24 | 72.5 | 18.77 | 1.60 |
