Table 1.
The molar ratio of raw materials of PCUs
| Samples | MDI (mmol) | PCDL (mmol) | BDO (mmol) | MPCDL (mmol) |
|---|---|---|---|---|
| PCU40 | 8 | 4 | 4 | 0 |
| PCU31 | 8 | 4 | 3 | 1 |
| PCU22 | 8 | 4 | 2 | 2 |
| PCU13 | 8 | 4 | 1 | 3 |
| PCU04 | 8 | 4 | 0 | 4 |
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