Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Property changes in the sulfonated poly(ether ether ketone) (SPEEK) membrane with varying degrees of sulfonation [17].
| Degree of Sulfonation (%) | Water Uptake (%, RT) |
Thickness Swelling Ratio (%, RT) | Proton Conductivity (S/cm, 80 °C) | Tensile Strength (MPa) | Thermal Stability (% Degradation to 600 °C) | Oxidative Stability (~min) |
|---|---|---|---|---|---|---|
| 40.23 | 6.29 | 2.13 | 0.2571 | 73 | 44 | 200 |
| 65.52 | 14.62 | 12.44 | 0.3003 | 63 | 46 | 56 |
| 75.95 | 52.01 | 27.20 | 0.4252 | 50.45 | 50 | <6 |
| 89.23 | 97.98 | 34.54 | 0.4649 | 41 | 56 | <2 |
