IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Carbon dioxide with Methane and Carboxylated Poly(phenylene oxide) (CPPO)
Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Carboxylated Poly(phenylene oxide) (CPPO); ; []  NIST Chemistry WebBook for detail
   (3) Methane; CH4; [74-28-8]  NIST Chemistry WebBook for detail
Original Measurements:
   B.J. Story and W.J. Koros, J. Appl. Polym. Sci. 42, 2613 (1991).

 Variables:
   Temperature = 308 K
   Pressure = 0-2.0 MPa (0-20 atm)

 Prepared By:
   Yu. P. Yampol'skii

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
Dual mode sorption parameters for various gases in CCPO at 308 K
Chemical NameHenry's law constant, K [cm3 (STP) cm-3 atm-1]Langmuir's parameter, CH [cm3(STP) cm-3]Affinity Coefficient b [atm-1]
CO20.791826.280.2852
CH40.298115.530.1254
 View Figure 1 for this Evaluation

Method/Apparatus/Procedure:
   A standard pressure decay system (Ref. 1) was used in pure gas sorption. Mixed gas sorption experiments were performed using a special apparatus having additional chambers for preparation and chromatographic sampling of gas mixtures.

 Source and Purity of Materials:
   CPPO: prepared via lithiation into methyl groups with BuLi/THF with subsequent carboxylation and acidification. The average content of COOH groups per repeat unit was 0.22.

 Estimated Errors:

   Temperature: No information given.

 References:
   1W. S. Koros and D. R. Paul, J. Polym. Sci., Polym. Phys. Ed. 14, 1903 (1976).