Research Article
Preparation and Application of Aromatic Polymer Proton Exchange Membrane with Low-Sulfonation Degree
Table 1
Effect of reaction conditions on the degree of sulfonation.
| SPPEK quality (g) | Sulfuric acid (ml) | Time (h) | Oleum (ml) | Temperature (°C) | IEC (mmol/g) | DS (%) |
| 6 | 55 | 24 | 0 | RT | ≈0 | ≈0 | 6 | 55 | 48 | 0 | RT | 0.75 | 7 | 6 | 55 | 4 | 0 | 60 | 0.71 | 12 | 6 | 30 | 4 | 30 | RT | 0.63 | 20 | 6 | 0 | 4 | 30 | 60 | 1.06 | 36 | 6 | 0 | 8 | 30 | 60 | 1.08 | 48 | 6 | 0 | 24 | 30 | 60 | 1.12 | 56 | 6 | 0 | 6 | 30 | 60 | 1.14 | 67 | 12 | 0 | 6 | 50 | 60 | 1.15 | 85 | 12 | 0 | 7 | 50 | 60 | 1.15 | 91 |
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