Table 4.
X-ray photoelectron spectroscopy (XPS) results of the residual char of EP and EP/polysulfone composites.
| Sample | C (% a) | N (%) | O (%) | P (%) | S (%) |
|---|---|---|---|---|---|
| EP | 82.82 | 3.22 | 13.77 | 0.10 | 0.09 |
| EP/ArPN2 Inner | 82.49 | 1.10 | 16.10 | 0.13 | 0.18 |
| EP/ArPN2 Outer | 79.19 | 3.16 | 16.65 | 0.84 | 0.17 |
| EP/ArPO2 Inner | 81.80 | 1.11 | 16.74 | 0.14 | 0.21 |
| EP/ArPO2 Outer | 75.52 | 2.88 | 19.28 | 2.05 | 0.26 |
| EP/ArOPN2 Inner | 80.87 | 1.09 | 17.52 | 0.28 | 0.24 |
| EP/ArOPN2 Outer | 71.34 | 5.53 | 19.78 | 2.92 | 0.43 |
| EP/ArOPO2 Inner | 80.92 | 3.26 | 14.35 | 1.24 | 0.23 |
| EP/ArOPO2 Outer | 72.17 | 4.50 | 19.98 | 2.87 | 0.48 |
a Atomic concentration.