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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Carbon dioxide with Copoly(pyromellitic dianhydride-oxydianiline) PMDA (polyimide Kapton H)
Components:
(1) Carbon dioxide; CO2; [124-38-9]
NIST Chemistry WebBook
for detail
(2) Copoly(pyromellitic dianhydride-oxydianiline) PMDA-ODA (polyimide Kapton H); ; [25036-53-7]
NIST Chemistry WebBook
for detail
Original Measurements:
H. Hachisuka, Y. Tsujita, A. Takizawa and T. Kinoshita, Polymer J. 21, 681 (1989).
Variables:
Temperature = 298 K
Pressure = 298 K
Prepared By:
Yu. P. Yampol'skii
Experimental Data:
(Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
Table 1. Dual mode sorption parameters as a function of imide content (%) of CO
2
in polyimide films (The original data were represented graphically)
Henry's law constant, K [cm
3
(STP)/cm
3
cm Hg]
Langmuir's parameter, C
H
[cm
3
(STP) cm
-3
]
Affinity Coefficient b [cm/Hg]
Remark(s)
0.0596
2.14
0.0047
3.62 [imide content (%)]
0.0810
72.84
0.0061
34.76
0.0872
273.54
0.0072
40.61
0.0956
211.76
0.0073
51.28
0.0922
175.26
0.0075
57.93
0.0720
34.44
0.0084
100
Table 2. Sorption isotherms of CO
2
in the films imidized for various periods at 423 K (The original data were represented graphically)
Pressure [kPa]
Sorption [(V*
1
(STP)/V*
2
)]
Remark(s)
49
3.08
Film not imidized
97
5.32
Film not imidized
199
9.37
Film not imidized
301
12.67
Film not imidized
400
15.97
Film not imidized
501
18.67
Film not imidized
596
20.97
Film not imidized
696
23.17
Film not imidized
800
25.54
Film not imidized
900
27.33
Film not imidized
68
6.47
Film imidized for 50 h
135
9.91
Film imidized for 50 h
268
14.91
Film imidized for 50 h
398
18.20
Film imidized for 50 h
534
21.43
Film imidized for 50 h
665
24.03
Film imidized for 50 h
799
26.50
Film imidized for 50 h
906
28.36
Film imidized for 50 h
1052
30.45
Film imidized for 50 h
1191
32.60
Film imidized for 50 h
134
12.62
Film imidized for 100 h
295
19.18
Film imidized for 100 h
399
22.55
Film imidized for 100 h
533
25.97
Film imidized for 100 h
665
29.01
Film imidized for 100 h
782
31.74
Film imidized for 100 h
910
34.09
Film imidized for 100 h
1056
36.68
Film imidized for 100 h
1174
38.47
Film imidized for 100 h
64
9.94
Film imidized for 200 h
135
13.88
Film imidized for 200 h
264
19.82
Film imidized for 200 h
400
23.87
Film imidized for 200 h
553
27.85
Film imidized for 200 h
667
30.46
Film imidized for 200 h
800
33.25
Film imidized for 200 h
924
35.41
Film imidized for 200 h
1044
37.44
Film imidized for 200 h
1178
39.54
Film imidized for 200 h
132
14.89
Film imidized for 400 h
266
20.83
Film imidized for 400 h
395
24.94
Film imidized for 400 h
519
28.62
Film imidized for 400 h
660
31.72
Film imidized for 400 h
791
34.89
Film imidized for 400 h
936
37.48
Film imidized for 400 h
1048
39.46
Film imidized for 400 h
Method/Apparatus/Procedure:
Sorption measurement was carried out by Cahn 2000 electromicro-balance.
Source and Purity of Materials:
CO
2
: purity 99.9 %. Polyimide: prepared by imidization of the polyamide produced by the reaction of pyromellitic acid dianhydride with 4,4’ diaminodiphenyl ether in
N
-methylpyrrolidone solution. Imidization was carried out at 423 K for 50—400 h
in vacuo
. An additional sample with 100 % imide content was also studied. For the thermally treated samples, the imide content lay in the range 35 % to 58%.
T
g
of unimidized polymer and polyimide were equal to 428 and 683 K, respectively.
Estimated Errors:
Temperature: No information given.