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Gas transport properties of sulfonated copolyimides: influence of structural parameters and relative humidity
Author(s) -
Piroux Fabienne,
Espuche Eliane,
Escoubes Marielle,
Mercier Régis,
Pineri Michel
Publication year - 2002
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200211)188:1<61::aid-masy61>3.0.co;2-y
Subject(s) - anhydrous , permeability (electromagnetism) , polymer chemistry , diamine , materials science , relative humidity , membrane , chemical engineering , diffusion , thermodynamics , chemistry , organic chemistry , biochemistry , physics , engineering
Structure‐property relationships in terms of gas transport have been established for a large series of sulfonated copolyimides. At anhydrous state, a large range of permeability values can be obtained varying the nature of the non‐sulfonated diamine, the sulfonated diamine content and the sulfonated block length. The diffusion coefficient is in all cases the dominant factor that explains the permeability level. The gas permeability coefficients decrease when the copolyimides are hydrated. A particular behaviour has been evidenced on some membranes for carbon dioxide.