IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet 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:
   K. Tanaka, H. Kita and K. Okamoto, Japan - US Polymer Symposium, p.249-250 (1985).

 Variables:
   Temperature = 323 K - 383 K
   Pressure = 0-2.0 MPa

 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*
T/KHenry's law constant, K [cm3(STP)/cm3 atm]Langmuir's parameter, CH [cm3(STP) cm-3]Affinity Coefficient b [atm-1]
323 0.508.60.44
353 0.355.00.30
383 0.253.00.19
 Notes:
   *  Read by the compiler from the plot.

 Method/Apparatus/Procedure:
   Sorption was measured by the pressure decay method. The same isotherms were obtained for "as received" samples and the specimens preliminary exposed to 50 atm of carbon dioxide at 323 K for 24 h.

 Source and Purity of Materials:
   Polyimide Upilex R (Ube Industries) had the glass transition temperature 558 K.

 Estimated Errors: