Components:
(1) Carbon dioxide,
CO2; [124-38-9]
NIST WebBook
(2) Polyimide of BPDA and ODA (Upilex-R),
None; [26615-45-2]
NIST WebBook
Original Measurements
Variables:
Ambient temperature: 308 - 383 K
Pressure: 0 - 3.0 MPa
Prepared by:
Method/Apparatus/Procedure:
Apparatus and procedure of sorption measurement was similar to one described in ref. (1).
Source and Purity of Materials:
- Films of the polymer prepared from BPDA and ODA in p-chlorphenol were cast from the same solvent, dried (373 K, 3 h.), immersed in ethanol, dried once more at 443 K for 20 h. (Sample 1). Sample 2 was prepared by annealing it at 543 K, 3 h. Commercial Upilex-R (Ube Industries) had Tg=558K, ρ = 1.402 g/cc. Sample 1 had the same Tg.
References
1 Koros, W. J.; Paul, D. R.; J. Polym. Sci., Polym. Phys. Ed., 1976, 14, 1903.
Experimental Values:
Dual mode sorption parameters for CO2 in commercial and laboratory samples of BPDA-ODA polyimides
| T (K) | H (cm3(g) cm-3(s) atm-1) | C'H (cm3/cm3) | b (atm-1) |
|---|---|---|---|
| 308.0 | 5.96 x 10-1 | 12.0 | 4.78 x 10-1 |
| 323.0 | 4.56 x 10-1 | 10.3 | 3.48 x 10-1 |
| 353.0 | 3.35 x 10-1 | 5.9 | 2.52 x 10-1 |
| 383.0 | 2.54 x 10-1 | 3.4 | 1.62 x 10-1 |
| 323.0 | 6.09 x 10-1 | 17.9 | 3.92 x 10-1 |
| 353.0 | 4.49 x 10-1 | 10.6 | 2.36 x 10-1 |
| 353.0 | 3.16 x 10-1 | 11.0 | 1.67 x 10-1 |
| 383.0 | 3.27 x 10-1 | 7.0 | 1.40 x 10-1 |
| 353.0 | 2.67 x 10-1 | 4.7 | 2.16 x 10-1 |
