Components:

(1) Helium, He; [7440-59-7] NIST WebBook
(1) Nitrogen (Molecule), N₂; [7727-37-9] NIST WebBook
(1) Oxygen, O₂; [7782-44-7] NIST WebBook
(1) Carbon dioxide, CO₂; [124-38-9] NIST WebBook
(1) Methane, CH₄; [74-82-8] NIST WebBook
(2) Polypyrrolone, None; [12634-94-7] NIST WebBook

Original Measurements

Walker, D. R. B.; Koros, W. J.; J. Membr. Sci.; 55, 99-117 (1991).

Variables:

Ambient temperature: 308 K
Pressure: 0.3 - 1.0 MPa

Prepared by:

Yu.P. Yampol'skii

Method/Apparatus/Procedure:

Pressure decay method and apparatus was used.

Source and Purity of Materials:

1. The polymer was synthesized according to ref. (1). It had a density 1.405 g/cc. All the gases were Linde UHP (purity more than 99.97%).

References

¹ Foster, R. T.; Marvel C. S. J. Polym. Sci., A, 1965, 3, 417.