Table 3.
Mechanical properties, ionic conductivities, and their corresponding activation energy of the developed membranes at 30 and 80 °C.
| Sample | Average mechanical propertiesa | Conductivity [σ] (mS cm−1) | Activation energy kJ mol−1 | ||
|---|---|---|---|---|---|
| Tensile strength (MPa) | Elongation at break (%) | 30 °C | 80 °C | ||
| NFPA-Im-1 | 73 ± 10 | 36 ± 6 | 34.7 | 109.5 | 20.6 |
| NFPA-Im-2 | 75 ± 10 | 38 ± 7 | 35.5 | 112.6 | 20.8 |
| NFPA-Im-3 | 77 ± 12 | 39 ± 8 | 39.4 | 130.1 | 20.2 |
| NFPA-Im-4 | 75 ± 12 | 38 ± 5 | 41.3 | 125.4 | 19.9 |
| NFPA-TMA-1 | 73 ± 11 | 35 ± 7 | 46.6 | 126.5 | 15.9 |
| NFPA-TMA-2 | 75 ± 10 | 30 ± 6 | 48.3 | 116.1 | 18.0 |
| NFPP-Im-1 | 16 ± 1 | 55 ± 8 | 45.2 | 138.2 | 21.3 |
| NFPP-Im-2 | 17 ± 2 | 59 ± 7 | 48.4 | 148.6 | 20.7 |
| NFPP-TMA-1 | 16 ± 3 | 58 ± 7 | 41.3 | 132.6 | 21.2 |
| NFPP-TMA-2 | – | – | 44.6 | 127.5 | 18.9 |
aAt 25 °C 80% relative humidity.