IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Polyimide Upilex R

Components:
   (1) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (2) Polyimide Upilex R; ; [26615-45-2]  NIST Chemistry WebBook for detail

Original Measurements:
   E. Sada, H. Kumazawa and P. Xu, J. Appl. Polym. Sci. 35, 1497 (1988).

Variables:
   Temperature = 303 K - 333 K
   Pressure = 0-1.7 MPa

Prepared By:
   Yu. P. Yampol'skii

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

Dual sorption parameters for carbon dioxide in Upilex polymide
T/K	Henry's law constant, K [cm³(STP)/cm³ atm]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	Affinity Coefficient b [atm^-1]	Remark(s)
303	1.24	7.39	1.70	Based on pressure
313	1.04	5.67	1.23	Based on pressure
323	0.817	4.27	0.865	Based on pressure
333	0.692	3.34	0.635	Based on pressure
303	1.35	6.93	1.91	Based on fugacity
313	1.12	5.28	1.35	Based on fugacity
323	0.875	3.95	0.954	Based on fugacity
333	0.736	3.09	0.683	Based on fugacity


Pressure	Fugacity	Remark(s)
-16.6	-15.9	DeltaH(D) [kJ/mol]
-27.9	-29.0	DeltaH(H) [kJ/mol]

View Figure 1 for this Evaluation

Method/Apparatus/Procedure:
   Sorption was measured by pressure decay method. The apparatus was similar to that described in Ref. 1.

Source and Purity of Materials:
   Polyimide Upilex R: Ube Industries; glass transition temperature 558 K.

Estimated Errors:

   Temperature: No information given.

References:
   ¹W. 3. Koros, D. R. Paul, and A. A. Rocha, J. Polym. Sci., Polym. Plays. Ed. 14, 687 (1976).