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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Poly(methyl methacrylate) (PMMA) and Poly(vinylidene fluoride) (PVF2)
Components:
(1) Poly(methyl methacrylate) (PMMA); ; [9011-14-7]
NIST Chemistry WebBook
for detail
(2) Carbon dioxide; CO2; [124-38-9]
NIST Chemistry WebBook
for detail
(3) Poly(vinylidene fluoride) (PVF2); ; [24937-79-9]
NIST Chemistry WebBook
for detail
Original Measurements:
J.S. Chiou and D.R. Paul, J. Appl. Sci. 32, 2897 (1986).
Variables:
Temperature = 308 K
Pressure = 0-2.5 MPa (0-25 atm)
Concentration = mass % PVF = 0-100
Prepared By:
Yu. P. Yampol'skii
Experimental Remarks:
The sorption isotherms for some blends (PVF
2
content in the range 35-60 mass %) showed an unusual form and could not be described by dual mode sorption model. A modified DMS model was proposed where for the langmuir capacity parameter
C
'
H
from the DMS model an equation was suggested:
C
'
H
0
(
T
s
0-
T
),
where
C
'
H
0
is initial Langmuir capacity parameter prior to my reduction in
T
s
is the glass transition temperature in the presence of sorbed gas, and
T
is the temperature of measurement, i.e., 308 K.
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
Sorption parameters for carbon dioxide in PMMA/PVF
2
blends*
Chemical Name
Henry's law constant, K
Langmuir's parameter, C
H
Affinity Coefficient b
K
a
Volume Fraction Phase
a
Method/Comments
100 [PVF(2) mass %]
0.664
—
—
1.559
0.426
From isotherm slope
80
0.865
—
—
1.394
0.621
From isotherm slope
60
1.105
—
—
1.362
0.812
From isotherm slope
50
1.215
—
—
1.371
0.886
From isotherm slope
40
1.283
—
—
1.346
0.953
From isotherm slope
35
1.319
—
—
1.358
0.971
From isotherm slope
60
1.494
7.26
0.0859
—
0.812
From regression analysis
40
1.403
8.15
0.101
—
0.953
From regression analysis
35
1.417
10.9
0.126
—
0.971
From regression analysis
20
1.352
16.3
0.103
—
1.0
From regression analysis
0
1.409
25.6
0.0993
—
1.0
From regression analysis
View Figure 1 for this Evaluation
View Figure 2 for this Evaluation
Notes:
*
Units: α, dimensionless; cm
3
(STP)/cm
3
atm;
C
'
H
0
, cm
3
(STP)/cm
3
atm;
b
, atm
-1
.
Method/Apparatus/Procedure:
No details of the experimental procedure are given. Apparently, sorption is measured by pressure decay method.
1
Source and Purity of Materials:
PMMA Rohm and Hans Co. (Plexiglas V(811)), fully amorphous, glass transition temp. 378 K. PVF2: Pennwalt Co. (Kynar 460 N), crystallinity 60 %, melting point 433 K. Blends: prepared as described in Ref. 2. Miscible blends were studied.
Estimated Errors:
Temperature: No information given.
References:
1
W, J. Koroa, D. R. Paul, and A. A. Rocha, J. Polym. Sci,, Polym. Phys. Ed. 14, 687 (1976)
2
J. S. Chiou, J. W. Barlow, and D. R. Paul, J. Appl. Polym. Sci. 30, 2633 (1985).