PEEKおよびPI薄膜の水素透過度の温度依存性

抄録

In this study, we conducted a gas permeation test on polyether ether ketone (PEEK) thin films, which at different temperatures using a Gas-Transmission rate-Measuring-Equipment(GTME) and compared with Polyimide (PI) that was already obtained the tests before. We conducted hydrogen permeation test was in the temperature range from room temperature to 493 K and examined the temperature dependence of the hydrogen permeability in the PEEK specimens with thicknesses of 50 and 75 μm. The results were compared with the PI ones. As a result, PEEK specimens showed hydrogen permeability of 3.61 × 10^-16 to 1.35 × 10^-14 [mol-H₂ / (m · s · Pa)] and hydrogen permeability increased with increasing the temperature from room temperature to 493 K. The change in hydrogthen permeability of PEEK specimens with thicknesses of 50 μm and 75 μm in the temperature range from 413K to 493 K were 2.51 × 10^-15 [mol-H₂ / (m · s · Pa)] and 2.10 × 10^-15 [mol-H₂ / (m · s · Pa)], which was greater than the change in hydrogen permeability in the temperature range from to 297 K to 413 K were 1.05 × 10^-14 [mol-H₂ / (m · s · Pa)] and 9.50 × 10^-15 [mol-H₂ / (m · s · Pa)]. PI showed hydrogen permeability of 3.30 × 10^-16 to 5.16 × 10^-14 [mol-H₂ / (m · s · Pa)] and hydrogen permeability increased with increasing the temperature from room temperature to 423 K. The specimen with a thickness of 7.5 μm had the highest hydrogen permeability. This indicates that diffusion between polymers is related to hydrogen permeability.