IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Methane, Poly(methyl methacrylate) (PMMA) and Bisphenol chloral polycarbonate (BCPC)

Components:
   (1) Bisphenol chloral polycarbonate (BCPC); ; [31546-39-1]  NIST Chemistry WebBook for detail
   (2) Poly(methyl methacrylate) (PMMA); ; [9011-14-7]  NIST Chemistry WebBook for detail
   (3) Carbon dioxide with Methane; CO2, CH4; [124-38-9, 74-82-8]  NIST Chemistry WebBook for detail

Original Measurements:
   P.C. Raymond and D.R. Paul, J. Polym. Sci., Part B: Polym. Phys. 28, 2103 (1990).

Variables:
   Temperature = 308 K
   Pressure = 0-2.5 MPa

Prepared By:
   V. I. Bonder

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)

Dual mode sorption parameters for carbon dioxide and methane in polymers at 308 K
Chemical Name	Henry's law constant, K [cm³(STP)/cm³ atm]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	Affinity Coefficient b [atm^-1]
Carbon dioxide (in conditioned polymers) [PMMA Vol.%] 0	0.718	14.9	0.271
Carbon dioxide (in conditioned polymers) [PMMA Vol.%] 28.0	0.736	14.8	0.240
Carbon dioxide (in conditioned polymers) [PMMA Vol.%] 53.9	0.778	15.7	0.190
Carbon dioxide (in conditioned polymers) [PMMA Vol.%] 77.8	1.03	11.9	0.245
Carbon dioxide (in conditioned polymers) [PMMA Vol.%] 100	1.20	15.6	0.172
Methane (in unconditioned polymers) [PMMA Vol.%] 0	0.130	6.64	0.088
Methane (in unconditioned polymers) [PMMA Vol.%] 28.0	0.116	6.92	0.069
Methane (in unconditioned polymers) [PMMA Vol.%] 53.9	0.144	4.58	0.077
Methane (in unconditioned polymers) [PMMA Vol.%] 77.8	0.133	4.60	0.061
Methane (in unconditioned polymers) [PMMA Vol.%] 100	0.199	1.53	0.153

View Figure 1 for this Evaluation

View Figure 2 for this Evaluation

Method/Apparatus/Procedure:
   A pressure decay method was used. Methane sorption was measured on samples that had not previously been exposed to CO₂. For CO₂ these measurements were preceded by conditioning the films at 25 atm of CO₂ for 24 h.

Source and Purity of Materials:
   BCPC: General Electric Co.
PMMA: Rohm and Haas Co.
      PMMAmass %                  T_g/K      density/g cm^-3
      0                                             437             1.392
      25                                           413             1.336
      50                                           401             1.285
      75                                           386             1.235
      100                                       379             1.188

Estimated Errors:

Temperature: No information given.