Table 4.
Atomic concentrations (%) determined by XPS for six different composite particles (mean ± S.D., n = 3).
| Formula | Atomic Concentration (%) | Surface Coverage of Additive (%) |
Surface Excess of Additive a |
|||||
|---|---|---|---|---|---|---|---|---|
| C1s | O1s | Cl2p | ||||||
| SS1 | 77.5 | ±0.9 | 16.8 | ±0.6 | 3.7 | ±0.6 | 8.3 | 1.7 |
| SS2 | 78.7 | ±0.6 | 17.2 | ±0.4 | 3.6 | ±0.3 | 7.5 | 1.5 |
| SS3 | 78.1 | ±0.5 | 16.7 | ±0.5 | 4.1 | ±0.7 | 6.5 | 1.3 |
| SD1 | 77.7 | ±0.4 | 19.5 | ±0.7 | 2.8 | ±0.8 | 24.7 | 4.9 |
| SD2 | 77.9 | ±0.8 | 19.7 | ±0.3 | 2.4 | ±0.9 | 20.8 | 4.2 |
| SD3 | 77.2 | ±0.7 | 20.2 | ±0.6 | 2.6 | ±0.7 | 28.1 | 5.6 |
a Calculated as: (surface coverage of additive)/(the theoretical %weight fraction of additive, 5%).