IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Nitrogen with Oxygen, Carbon dioxide, Methane, Polyimides derived from hexafluoroisopropylidene dianhydrides and diamines (see formulas)
Components:
   (1) Polyimides derived from hexafluoroisopropylidene dianhydrides and diamines (see formulas); ; []  NIST Chemistry WebBook for detail
   (2) Nitrogen with Oxygen, Carbon dioxide, Methane; N2, O2, CO2, CH4; [7727-37-9, 7782-44-7, 124-38-9, 74-82-8]  NIST Chemistry WebBook for detail
Original Measurements:
   M.R. Coleman and W.J. Koros, J. Membr. Sci. 50, 285-297 (1990).

 Variables:
   Temperature = 308 K
   Pressure = 1.013 MPa (10 atm)

 Prepared By:
   Yu. P. Yampol'skii

 Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)
   
Solubility coefficients S /cm3 (STP)/ cm3 atm of gases in polyimides
Chemical NamePolymerKeunen coefficient, S
O26FDA-ODA1.03
O26FDA-MDA0.82
O26FDA-IPDA0.90
O26FDA-6FpDA0.99
O26FDA-6FmDA0.61
N26FDA-ODA0.54
N26FDA-MDA0.46
N26FDA-IPDA0.50
N26FDA-6FpDA0.67
N26FDA-6FmDA0.35
CO26FDA-ODA4.89
CO26FDA-MDA3.96
CO26FDA-IPDA4.24
CO26FDA-6FpDA4.72
CO26FDA-6FmDA2.89
CH46FDA-ODA1.32
CH46FDA-MDA1.18
CH46FDA-IPDA1.20
CH46FDA-6FpDA1.44
CH46FDA-6FmDA0.81
 Method/Apparatus/Procedure:
   Sorption measurements were made with a pressure decay cell described in ref. (1).

 Source and Purity of Materials:
   Polyimides from Hoechst-Celanese Co had the following characteristics:

Polymer                             Tg, K                             ρ, g/cc
 6FDA-ODA                      577                                  1.432
6FDA-MDA                     577                                  1.400
6FDA-IPDA                     583                                  1.352
6FDA-6FpDA                  593                                  1.466
6FDA-6FmDA                 527                                  1.493

The gases had purity > 99.97%.

Estimated Errors: