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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Argon with Nitrogen, Carbon dioxide, Methane and Polystyrene (PS)
Components:
(1) Polystyrene (PS); ; [9003-53-6]
NIST Chemistry WebBook
for detail
(2) Argon with Nitrogen, Carbon dioxide, Methane; Ar, N2, CO2, CH4; [7440-37-1, 7727-37-9, 124-38-9, 74-82-8]
NIST Chemistry WebBook
for detail
Original Measurements:
W.R. Vieth, P.M. Tam and A.S. Michaels, J. Colloid Interface Sci. 22, 360 (1966).
Variables:
Temperature = 298 K
Pressure = 298 K
Prepared By:
A.K. Bokarev
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
Table 1. Dual mode sorption parameters for various gases in polystyrene at 298 K
Chemical Name
Henry's law constant, K [cm
3
(STP)/g atm]
Langmuir's parameter, C
H
[cm
3
(STP) cm
-3
]
Affinity Coefficient b [atm
-1
]
Remark(s)
N2
0.02
6.65
0.015
oriented---First Run
Ar
0.06
7.55
0.021
oriented
CH4
0.13
5.58
0.080
oriented
CO2
0.57
6.05
0.400
oriented
N2
0.025
8.3
0.013
unoriented
Ar
0.065
9.1
0.021
unoriented
CH4
0.160
7.4
0.108
unoriented
CO2
0.650
7.7
0.370
unoriented
Table 2. Solubility isotherms of various gases in polystyrene at 298 K (The original data were represented graphically)
Chemical Name
Pressure [MPa]
Sorption [(V*
1
(STP)/V*
2
)]
Remark(s)
Ar
0.42
0.98
oriented
Ar
0.79
1.68
oriented
Ar
1.12
2.17
oriented
Ar
1.43
2.75
oriented
Ar
1.78
3.25
oriented
Ar
2.04
3.32
oriented
CO2
0.14
3.07
oriented
CO2
0.27
4.63
oriented
CO2
0.41
6.19
oriented
CO2
0.55
7.54
oriented
CO2
0.69
8.77
oriented
CO2
0.86
9.84
oriented
CO2
1.02
10.86
oriented
CO2
1.17
11.97
oriented
CO2
1.37
13.12
oriented
CO2
1.55
14.39
oriented
CO2
1.73
15.33
oriented
CH4
0.34
1.80
oriented
CH4
0.51
2.54
oriented
CH4
0.78
3.36
oriented
CH4
1.05
4.14
oriented
CH4
1.34
4.88
oriented
CH4
1.63
5.49
oriented
CH4
1.90
6.19
oriented
N2
0.47
0.66
oriented
N2
0.99
1.07
oriented
N2
1.53
1.56
oriented
N2
1.99
1.93
oriented
Ar
0.54
1.23
unoriented
Ar
0.99
1.97
unoriented
Ar
1.50
2.71
unoriented
Ar
1.84
3.20
unoriented
Ar
2.06
3.48
unoriented
CO2
0.17
3.36
unoriented
CO2
0.34
5.57
unoriented
CO2
0.51
7.42
unoriented
CO2
0.68
8.89
unoriented
CO2
0.88
10.29
unoriented
CO2
1.08
11.56
unoriented
CO2
1.32
12.91
unoriented
CO2
1.54
14.47
unoriented
CO2
1.77
15.53
unoriented
CH4
0.43
2.38
unoriented
CH4
0.85
3.57
unoriented
CH4
1.26
4.67
unoriented
CH4
1.77
5.78
unoriented
CH4
2.02
6.27
unoriented
N2
0.60
0.82
unoriented
N2
1.08
1.15
unoriented
N2
1.57
1.64
unoriented
N2
2.06
1.97
unoriented
Ar
0.56
1.60
oriented----Second Run
Ar
1.05
2.42
oriented
Ar
1.42
3.20
oriented
Ar
1.77
3.73
oriented
Ar
2.10
4.30
oriented
CO2
0.35
6.35
oriented
CO2
0.69
9.88
oriented
CO2
1.04
13.12
oriented
CO2
1.35
15.04
oriented
CO2
1.75
18.40
oriented
CO2
1.98
19.88
oriented
CH4
0.48
3.40
oriented
CH4
0.93
5.16
oriented
CH4
1.36
6.60
oriented
CH4
1.79
7.87
oriented
CH4
2.06
8.44
oriented
N2
0.58
0.98
oriented
N2
1.09
1.48
oriented
N2
1.55
1.89
oriented
N2
2.09
2.42
oriented
Ar
0.43
1.23
unoriented
Ar
1.01
2.34
unoriented
Ar
1.70
3.57
unoriented
Ar
2.09
4.10
unoriented
CO2
0.29
5.82
unoriented
CO2
0.83
11.39
unoriented
CO2
1.39
15.70
unoriented
CO2
1.89
18.89
unoriented
CH4
0.48
3.40
unoriented
CH4
0.97
5.25
unoriented
CH4
1.59
7.21
unoriented
CH4
2.03
8.24
unoriented
N2
0.49
0.78
unoriented
N2
0.86
1.19
unoriented
N2
1.33
1.64
unoriented
N2
1.85
2.21
unoriented
Method/Apparatus/Procedure:
A direct measurement of the solubility was made with a volumetric apparatus. With the film sample placed in the sorption bomb, the sorption system is evacuated and flushed with gas several times. The system is then evacuated to 0.02mm Hg. Gas is then introduced rapidly; and the initial pressure recorded. Sorption takes place instantaneously and proceeds until the equilibrium pressure is established.
Source and Purity of Materials:
Gases: minimum purity 99.99 %.
Biaxially oriented PS film; Dow Chemical Co., density 1.0490 g/cm
3
.
Cast annealed PS film: prepared from a solution of about 20 % by weight of oriented PS in methylene dichloride, density 1.0474 g/cm
3
.
Estimated Errors:
Solubility: Relative precision of solubilities: CO
2
8.1%; CH
4
6.3%; Ar 10.5%; N
2
15%.