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Relative composition of O1s in samples.
| Binding energy (eV) | Attribution | Relative composition | ||
|---|---|---|---|---|
| PEEK | PEEK-OH | PEEK-P | ||
| 530.6 | P-OH | 0 | 0 | 1.9 ± 0.5 |
| 531.3‒531.7 | O=C | 32.1 ± 1.0 | 13.1 ± 1.8 | 19.3 ± 6.3 |
| 532.4 | O-H | 0 | 11.4 ± 2.0 | 7.9 ± 3.7 |
| 533.3 | O-C | 67.9 ± 1.0 | 75.5 ± 2.2 | 70.8 ± 10 |
