IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Nitrogen with Oxygen, Carbon dioxide, Methane, Poly(trimethylsilyl propyne) (PTMSP)

Components:
   (1) Poly(trimethylsilyl propyne) (PTMSP); ; [87842-32-8]  NIST Chemistry WebBook for detail
   (2) Nitrogen with Oxygen, Carbon dioxide, Methane; N2, O2, CO2, CH4; [7727-37-9, 7782-44-7, 124-38-9, 74-82-8]  NIST Chemistry WebBook for detail

Original Measurements:
   Y. Ichiraku, S.A. Stern and T. Nakagawa, J. Membr. Sci. 34, 5 (1987).

Variables:
   Temperature = 308 K and 328
   Pressure = 0-2.7 MPa (0-27 atm)

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 various gases in PTMSP 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]
CO2	1.497	112.9	0.058
CO2	0.978*	71.9*	0.059*
CH4	0.667	87.8	0.035
N2	0.431	15.4	0.042
O2	0.656	16.8	0.036

View Figure 1 for this Evaluation

Notes:
   ^*  At 32 K.

Method/Apparatus/Procedure:
   The solubility was measured by a volumetric method. The apparatus and the procedure are described in detail in Ref. 1.

Source and Purity of Materials:
   Gases: purity >99.5 %.
PTMSP: Sanyo Chemical Industries, density 0.938 g/cm³, M_w = 700 000, no glass transition observed below 473 K.

Estimated Errors:
   Solubility: Relative precision of solubilities: from ±6.6%(C02) to ± 54%(N₂).

References:
   ¹V. M. Shah, B. 3. Hardy, and S. A. Stem, J. PolymPolym, Part B: Potym. Phys. 24, 2033 (1986).