Components:
(1) Carbon dioxide,
CO2; [124-38-9]
NIST WebBook
(1) Methane,
CH4; [74-82-8]
NIST WebBook
(2) Copoly(pyromellitic dianhydride-oxydianiline),
(C22H10N2O5)n; [25036-53-7]
NIST WebBook
Original Measurements
O'Brien, K. C.; Koros, W. J.; Husk, G. R.; J. Membr. Sci. 35, 217 (1988).
Variables:
Ambient temperature: 308 K
Pressure: 0.1 - 1.4 MPa
Prepared by:
Method/Apparatus/Procedure:
Sorption measurements were carried out using a single transducer apparatus described in Ref. 1.
Source and Purity of Materials:
- PMDA-ODA: polymerization performed in dimethylacetamide at 288-293 K to form polyamic acid precursor according to standard proccdure.2 The polyamic acid solution was wet cast on a glass substrate heated for 1 h at 353 K under Ar to remove the solvent and then imidized by a two-step cure under vacuum (24 h at 483 K and 4 h at 553 K). The polymer studied did not reveal a glass transaction temperature at temperatures up to 750 K. Density was 1.402 g/cm3.
Estimated Errors:
Mass concentration (m/v) (1): Relative precision of solubilities: 5%.
References
1
Sanders, S. E.; Ph.D. Dissertation, North Carolina State University, Raleigh, NC, 1983.
2
Sroog, C. E.; Endrey, A. L.; Abravio, S. V.; Berro, C. E.; Edwards, W. M.; Olivier, K. L.; J. Pol. Sci., Part A 3, 1373 (1965).
Experimental Values:
Sorption isotherms of carbon dioxide and methane in PMDA-ODA at 308 K (The original data were represented graphically)
| P (MPa) | Sorption (V1/V2) |
|---|---|
| 1.6 x 10-1 | 14.36 |
| 3.6 x 10-1 | 22.17 |
| 5.2 x 10-1 | 26.96 |
| 7.6 x 10-1 | 32.12 |
| 9.8 x 10-1 | 36.22 |
| 1.37 | 42.11 |
| 2.1 x 10-1 | 3.21 |
| 3.1 x 10-1 | 4.46 |
| 4.7 x 10-1 | 5.84 |
| 7.1 x 10-1 | 7.36 |
| 9.1 x 10-1 | 8.61 |
| 1.0 | 9.07 |
| 1.12 | 9.8 |
