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Structure and Gas Transport Properties of Polybenzoxazinoneimides with Biquinoline Units in the Backbone
Author(s) -
Polotskaya Galina,
Guliy Natalia,
Goikhman Mikhail,
Podeshvo Irina,
Brozova Libuse,
Pientka Zbynek
Publication year - 2015
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/masy.201400173
Subject(s) - polymer , imide , molecule , gas separation , polymer chemistry , materials science , gaseous diffusion , diffusion , membrane , volume (thermodynamics) , chemical engineering , chemistry , organic chemistry , thermodynamics , composite material , biochemistry , physics , electrode , engineering
Summary Four polymers with heteroaromatic structures were synthesized starting from dichloroanhydride of 2,2 / ‐biquinoline‐7,7 / ‐dicarboxylic acid. These are imide‐containing polyamic acid and product of its cyclization polybenzoxazinoneimide as well as complexes of these two polymers with Cu(I). Dense film membranes prepared from the four polymers were characterized in terms of their density and free volume. The gas permeabilities to H 2 , O 2 , N 2 , CO 2 , and CH 4 of the four films and the selectivities in separations of industrially important gas pairs were determined. Polymer chemical structures, polymer free volumes, diffusion coefficients and the sizes of gas molecules were correlated with polymer permeabilities. The prepared and investigated polymers show very good separation properties located near the upper bound lines in Robeson's diagrams.