Table 1. Summary of the mechanical properties and rupture energy of membranes at 80°C and 0 and 60% RH.
×, could not be obtained; --, was not measured.
| Membrane | Yield stress (MPa) | Maximum strain (%) | Young’s modulus (GPa) | Rupture energy (MJ m−3) | Change of rupture energy (%) | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0% RH | 60% RH | 0% RH | 60% RH | 0% RH | 60% RH | 0% RH | 60% RH | ||
| SPP-TFP-4.0 | 95.0 | 61.3 | 20.8 | 141.0 | 1.96 | 0.54 | 16.5 | 55.5 | +236.4 |
| SPP-TFP-4.0-PVDF | 85.5 | 35.5 | 39.7 | 126.4 | 1.32 | 0.50 | 27.2 | 28.1 | +3.3 |
| SPP-TFP-4.0-ePTFE-MD | 22.9 | 37.0 | 15.3 | 100.8 | 0.39 | 0.25 | 2.6 | 24.3 | +834.6 |
| SPP-TFP-4.0-ePTFE-TD | 11.3 | 21.0 | 31.5 | 116.7 | 0.48 | 0.31 | 2.8 | 16.7 | +496.4 |
| Nafion NRE 211 | 24.6 | 11.4 | 393.1 | 391.0 | 0.05 | 0.05 | 55.1 | 33.3 | −39.6 |
| Nafion XL-MD | 29.0 | 24.0 | 270.1 | 321.2 | 0.12 | 0.16 | 61.4 | 64.3 | +4.7 |
| Nafion XL-TD | 28.7 | 22.0 | 332.6 | 383.0 | 0.04 | 0.06 | 51.8 | 48.8 | −5.8 |
| pure PVDF | -- | 33.1 | -- | 96.7 | -- | 0.04 | -- | 17.6 | -- |
| Pure ePTFE-MD | -- | 7.3 | -- | 406.7 | -- | 0.01 | -- | 19.9 | -- |
| Pure ePTFE-TD | -- | × | -- | × | -- | × | -- | × | -- |