IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Carbon dioxide with Poly(vinyl butyral) (PVBu)
Components:
   (1) Poly(vinyl butyral) (PVBu); ; []  NIST Chemistry WebBook for detail
   (2) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
Original Measurements:
   Y. Kamiya, T. Hirose, K. Mizoguchi and K. Terada., J. Polym. Sci., Part B: Polym. Phys. 26, 1409 (1988).

 Variables:
   Temperature = 298 K
   Pressure = 0-5.0 MPa

 Prepared By:
   A.K. Bokarev

 Experimental Remarks:
   The isotherm was treated by the equation:

   C=CD+CH=[kD exp(sC*)]p+C1HObp[(1-C*/Cg)/(1+bp)],

where the parameters kD, C1HO, and b have the usual meaning. Cg is the solute concentration corresponding to the glass transition and

   C*=CD+fCH=[kDp+fC'HObp/(1+bp)]/[1+fC1HObp/Cg(1+bp)],

where f is an adjustable parameter, characterizing the plastisizing ability of a solute. Parameters for ordinary dissolution (Flory-Huggins's) and for Langmuir isotherms at 298K.

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

Henry's law constant, K [cm3 (STP) cm-3 atm-1]Concentration C1 [cm3(STP)/cm-3]Concentration NoteLangmuir's parameter, CH [cm3(STP) cm-3]Affinity Coefficient b [atm-1]103 * Keunen coefficient, S [cm3(STP)/cm-3]Remark(s)
1.1334.0[C(g)]20.7 (sorption), 28.6 (desorption)0.0963.50.8 (f)
 View Figure 1 for this Evaluation

Method/Apparatus/Procedure:
   Sorption isotherms were measured gravimetrically with a Cahn model 2000 electrobalance. A correction for the buoyancy was introduced.

 Source and Purity of Materials:
   CO2: purity 99.99 %.
PVBu Mitsubishi Monsanto Chemical Co., density at 308 K, 1.087 g/cm3, Mw between 34 000 and 38 000, butyral content 88 %.

 Estimated Errors:

   Temperature: No information given.

 References:
   1T. Hirose, K. Mizoguchi, and Y. Kamiya, 5. AppI. Polym. Sd. 30, 401 (1985).