IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Carbon dioxide with Polystyrene (PS) and Poly(vinylmethyl ether) (PVME) (polymer blends)

Components:
   (1) Polystyrene (PS); ; [9003-53-6]  NIST Chemistry WebBook for detail
   (2) Carbon dioxide; CO2; [124-38-9]  NIST Chemistry WebBook for detail
   (3) Poly(vinylmethyl ether) (PVME) (polymer blends); ; [9003-09-2]  NIST Chemistry WebBook for detail

Original Measurements:
   H. Hachisuka, T. Sato, Y. Tsujita, A. Takizawa and T. Kinoshita, Polymer J. 21, 417-424 (1989).

Variables:
   Temperature = 298 K
   Pressure = 0-1.33 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 for CO² in PS/PVME blends
10² * Henry's law constant, K [cm³(STP)/cm³ cm/Hg]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	10³ * Affinity Coefficient b [cm/Hg]	Composition	Remark(s)
1.12	4.1	2.36	100/0	—
Single phase blends 1.41	1.5	1.45	75/25	—
Single phase blends 2.01	–	–	50/50	—
Single phase blends 2.62	–	–	20/80	—
Phase separated blends 1.49	2.4	2.76	75/25	PS/PVME phase: (83/17) / (21/79)
Phase separated blends 2.05	0.4	4.73	50/50	PS/PVME phase: (73/27) / (31/69)
Phase separated blends 2.93	1.1	3.95	20/80	PS/PVME phase: (74/26) / (19/81)
Phase separated blends 4.00	–	–	0/100	—

Method/Apparatus/Procedure:
   Sorption measurement was carried out using electromicrobalance Cahn 2000. The correction for buoyancy was introduced.

Source and Purity of Materials:
   Type PS, % PVME, % T_g , K
Single phase 75 25    315.0
same 50    50    262.9
same 20    80    248.6
Phase separated 83 17    321.2
(75/25) 21    79    249.2
Phase separated 73 27    301.2
(50/50) 31 69    253.2
Phase separated 74 26    308.6
(20/80) 19 81    248.0

CO₂ purity >99.99%.

Estimated Errors: