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
Tanaka, K.; Kita, H.; Okamoto, K.; Japan - US Polymer Symposium, p. 249-250 (1985).
Variables:
Ambient temperature: 323 - 383 K
Pressure: 0 - 2.0 MPa
Prepared by:
Method/Apparatus/Procedure:
Sorption was measured by the pressure decay method. The same isotherms were obtained for 'as received' samples and the specimens preliminary exposed to 50 atm of carbon dioxide at 323 K for 24 h.
Source and Purity of Materials:
- Polyimide Upilex R (Ube Industries) had the glass transition temperature 558 K.
Experimental Values:
Dual mode sorption parameters*
| T (K) | H (cm3(g) cm-3(s) atm-1) | C'H (cm3/cm3) | b (atm-1) |
|---|---|---|---|
| 323.0 | 5.0 x 10-1 | 8.6 | 4.4 x 10-1 |
| 353.0 | 3.5 x 10-1 | 5.0 | 3.0 x 10-1 |
| 383.0 | 2.5 x 10-1 | 3.0 | 1.9 x 10-1 |
(*) Read by the compiler from the plot.
