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Synthesis and Characterization of Polybenzoxazinone and its Prepolymer Using Gas Separation
Author(s) -
Pientka Zbyněk,
Brozova Libuše,
Pulyalina Alexandra Y.,
Goikhman Mikhail Y.,
Podeshvo Irina V.,
Gofman Iosif V.,
Saprykitalia N.,
Polotskaya Galina A.
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201300436
Subject(s) - prepolymer , gas separation , condensation polymer , polymer chemistry , polymer , membrane , glass transition , solvent , chemical engineering , volume (thermodynamics) , chemistry , selectivity , materials science , organic chemistry , catalysis , polyurethane , biochemistry , physics , quantum mechanics , engineering
Polybenz‐3,1‐oxazinone‐4 (PBOZ) films are prepared via the thermal rearrangement of poly[(methylene‐ bis ‐anthranilamide) 4,4′‐diphenyloxidicarboxylic acid] (PAA) films by heating to 300 °C. PAA is synthesized by low‐temperature polycondensation. The PBOZ film exhibits excellent mechanical properties and a high glass‐transition temperature. Conversion of PAA to PBOZ leads to an increase in the fractional free volume as a result of thermal dehydration and cyclization during membrane formation and due to the removal of residual solvent. The excess free volume in the PBOZ film is approximately 3–4% of the total volume. The gas permeability and selectivity of the PBOZ film is higher than that of the PAA film. The thermal rearrangement of polymers is recognized as a suitable method to improve separation efficiency.