SDS Volume (4012)
Volume 70. Solubility of Gases in Glassy Polymers, p None
Original Measurements
Variables:
Room Temp:
333
$\pu{K}$
Pressure:
0 - 2.0
$\pu{MPa}$
Prepared by:
Method/Apparatus/Procedure:
A pressure decay method of sorption measurement used was described in detail in [1]. Each isotherm included several consecutive series of runs with stepwise pressure increase. The virgin films were degassed at 333 K for 120 h before measurement.
Source and Purity of Materials:
- $\ce{CO2}$ Coleman-grade 99.999%. $\ce{CH4}$: instrument-grade 99.7%. Kapton H: H. I. DuPont Co.; no glass transition temperature revealed in DSC measurement up to 777 K.
Estimated Errors:
Ambient temperature: No information given.
References
1 Koros, W. J.; Paul, D. R.; J. Polym. Sci., Polym. Phys. Ed., 1976, 14, 1903.
Components:
- Carbon dioxide, $\ce{ CO2 }$; [124-38-9] NIST WebBook
- Methane, $\ce{ CH4 }$; [74-82-8] NIST WebBook
- Copoly(pyromellitic dianhydride-oxydianiline) (PMDA-ODA), [25036-53-7] NIST WebBook
Experimental Data
Dual mode sorption parameters for carbon dioxide and methane in Kapton H at 333 K
| $k_{\rm{D}}$ ($\pu{cm3(g) cm-3(s) atm-1}$) | $C_{\rm{H}}^{\prime}$ ($\pu{cm3/cm3}$) | $b$ ($\pu{atm-1}$) |
|---|---|---|
| 0.380 | 12.280 | 0.296 |
| 0.700 | 2.684 | 0.174 |
| 0.439 | 11.817 | 0.316 |
| 0.073 | 2.653 | 0.175 |
None
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