Formulas of the FCOPUs.
| Designation | MDI (mole) | CO (mole) | PCL (mole) | Extender (mole) | Hard segment (wt%) | Soft segment (wt%) |
|---|---|---|---|---|---|---|
| 8FCOPU | 4 | 0.4 | 3.2 | 0.2 | 33.73 | 66.27 |
| 12FCOPU | 4 | 0.4 | 3.2 | 0.2 | 34.16 | 65.84 |
| 16FCOPU | 4 | 0.4 | 3.2 | 0.2 | 34.57 | 65.43 |
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