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Percentage of free and hydrogen-bonded carbonyl groups obtained from fitted-curve analysis.
| Sample | Hydrogen-Bonded Carbonyls (1699 cm−1) | Free Carbonyls (1726 cm−1) |
|---|---|---|
| SiTPU-1K-33 | 81.37 | 18.63 |
| SiTPU-2K-19 | 77.30 | 22.70 |
| SiTPU-2K-23 | 77.96 | 22.04 |
| SiTPU-2K-28 | 78.50 | 21.50 |
| SiTPU-2K-33 | 80.85 | 19.15 |
| SiTPU-2K-39 | 83.82 | 16.18 |
| SiTPU-3K-33 | 79.21 | 20.79 |
