IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Carbon dioxide with Cellulose acetate (CA)
Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Cellulose acetate (CA); ; [9004-35-7]  NIST Chemistry WebBook for detail
Original Measurements:
   E. Sada, H. Kumazawa, Y. Yoshio, S.-T. Wang and P. Xu, J. Polym. Sci., Part B: Polym. Phys. 26, 1035 (1988).

 Variables:
   Temperature = 293 K - 313 K
   Pressure = 293 K - 313 K

 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 carbon dioxide in cellulose acetate
T/KHenry's law constant, K [cm3(STP)/cm3 atm]Langmuir's parameter, CH [cm3(STP) cm-3]Affinity Coefficient b [atm-1]
2931.8322.70.500
3021.2420.30.437
3131.1017.70.280
 View Figure 1 for this Evaluation

Notes:
   *  delta;HH = –22.7 kJ/mol; deltaHD = –17.8 kJ/mol.

 Method/Apparatus/Procedure:
   Sorption was measured by the pressure decay method. The procedure and apparatus were similar to those described in Ref. 1.

 Source and Purity of Materials:
   CA: Eastman Kodak (E 398-3); content of acetyl groups 39.8 %. The film cast from acetone solution was annealed in a water bath at 363 K for 10 min. The film was dried in vacuum for 24 h before measurement of sorption.

 Estimated Errors:

   Temperature: No information given.

 References:
   1W. J. Koros, D. R. Paul, and A. A. Rocha, J. Polym. Sci., Polym. Phys. Ed. 14, 667 (1976).