Results of C1s XPS of char residue of neat EP and EP composites.
| Sample | C–C area (%) | C–O area (%) | C O area (%) | Cox/Ca |
|---|---|---|---|---|
| EP | 59.3 | 21.7 | 19 | 0.69 |
| SEP | 65.1 | 17.8 | 17.1 | 0.54 |
| ZEP | 74.9 | 19.8 | 5.3 | 0.34 |
| ZSEP | 77.6 | 12.4 | 10.0 | 0.29 |
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