All the tested specimens have square-shape with dimensions of
7.0 cm in both length and width. The samples were submerged into
solutions in different containers placed in an oven for degradation
test. Since the typical PEMFC is operated at temperature range of
65e80 C, degradation tests of silicone rubbers were carried out at
80 C. The degraded samples were taken out after a specific time
period and thoroughly rinsed with de-ionized water and dried in
air for further analysis.