IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Argon with Nitrogen, Carbon dioxide, Methane and Poly(ethyl methacrylate) (PEMA)

Components:
   (1) Poly(ethyl methacrylate) (PEMA); C3H8; [9003-42-3]  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:
   J.S. Chiou and D.R. Paul, J. Membr. Sci. 45, 167 (1989).

Variables:
   Temperature = 298 K - 318 K
   Pressure = 298 K - 318 K

Prepared By:
   Yu. P. Yampol'skii

Experimental Remarks:

   Solubility coefficient for N₂ at 308 K; 0.058 cm³(STP) cm^-3 atm^-1 (calculated by compiler).

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

Table 1. Dual mode sorption parameters for methane and argon in PEMA
T/K	Chemical Name	Henry's law constant, K [cm³ (STP) cm^-3 atm^-1]	Langmuir's parameter, C_H [cm³(STP) cm^-3]	Affinity Coefficient b [atm^-1]
298	CH4	0.183	2.87	0.0677
308	CH4	0.165	2.24	0.0536
313	CH4	0.144	1.87	0.0422
308	Ar	0.0902	1.20	0.0405

Table 2. Sorption isotherms of methane in PEMA at 298 K (a) and 318 K (b) (The original data were represented graphically)
Pressure [MPa]	Sorption [V₁(STP)/V₂)]
0.20	0.73
0.42	1.41
0.64	2.02
0.82	2.55
1.02	3.03
1.25	3.62
0.26	0.55
0.27	0.59
0.55	1.12
0.66	1.40
0.81	1.60
0.97	1.91
1.24	2.45
1.43	4.11
1.63	4.50
1.85	5.05
2.06	5.62
2.28	5.95
2.47	6.19
1.37	2.65
1.43	2.81
1.74	3.29
1.96	3.62
2.19	4.16
2.29	4.14
2.50	4.51
2.71	6.85
2.90	7.18
3.33	8.10
3.39	8.27
2.67	4.89
2.76	4.99
3.00	5.39
3.29	5.83
3.30	5.89
3.37	6.42
3.67	6.42

Table 3. Sorption isotherms of various gases in PEMA at 308 K (The original data were represented graphically)
Chemical Name	Pressure [MPa]	Sorption [V₁(STP)/V₂)]
Ar	0.27	0.33
Ar	0.39	0.48
Ar	0.50	0.61
Ar	0.77	0.94
Ar	0.85	1.07
Ar	1.04	1.22
Ar	1.26	1.51
Ar	1.40	1.68
Ar	1.61	1.94
Ar	1.75	2.05
Ar	1.98	2.25
Ar	2.04	2.42
Ar	2.27	2.66
Ar	2.45	2.77
Ar	2.79	3.21
Ar	2.85	3.21
Ar	3.29	3.69
Ar	3.43	3.82
Ar	3.68	4.08
CH4	0.25	0.70
CH4	0.51	1.29
CH4	0.75	1.89
CH4	1.02	2.44
CH4	1.34	3.20
CH4	1.52	3.44
CH4	1.82	4.15
CH4	2.14	4.63
CH4	2.23	5.00
CH4	2.60	5.57
CH4	2.83	6.01
CH4	3.09	6.42
CH4	3.20	6.71
CH4	3.54	7.34
CH4 (films conditioned in 30 atm of CO2)	0.33	0.90
CH4 (films conditioned in 30 atm of CO2)	0.52	1.38
CH4 (films conditioned in 30 atm of CO2)	0.61	1.62
CH4 (films conditioned in 30 atm of CO2)	0.77	2.02
CH4 (films conditioned in 30 atm of CO2)	0.92	2.30
CH4 (films conditioned in 30 atm of CO2)	1.03	2.70
CH4 (films conditioned in 30 atm of CO2)	1.28	3.09
CH4 (films conditioned in 30 atm of CO2)	1.42	3.47
CH4 (films conditioned in 30 atm of CO2)	1.62	3.75
CH4 (films conditioned in 30 atm of CO2)	2.00	4.47
CH4 (films conditioned in 30 atm of CO2)	2.07	4.69
CH4 (films conditioned in 30 atm of CO2)	2.33	5.2
CH4 (films conditioned in 30 atm of CO2)	2.53	5.28
CH4 (films conditioned in 30 atm of CO2)	2.73	5.66
CH4 (films conditioned in 30 atm of CO2)	2.76	5.90
N2	0.28	0.17
N2	0.34	0.26
N2	0.62	0.41
N2	0.68	0.46
N2	0.90	0.59
N2	1.05	0.61
N2	1.45	0.87
N2	1.56	0.95
N2	1.62	0.95
N2	1.89	1.10
N2	2.11	1.23
N2	2.25	1.34
N2	2.32	1.39
N2	2.63	1.54
N2	2.83	1.62
N2	2.91	1.73
N2	3.16	1.86
N2	3.39	2.03
N2	3.53	1.99
N2	3.67	2.21
N2	3.78	2.21

View Figure 1 for this Evaluation

Method/Apparatus/Procedure:
   Sorption isotherms were measured by the pressure decay method using a dual volume sorption cell.

Source and Purity of Materials:
   PEMA: DuPont Co. (Elvacite 2042).
M_w = 438 000, glass transition temp. 342 K (DSC method).

Estimated Errors:

   Temperature: No information given.