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Soluble polyimides with propeller shape triphenyl core for membrane based gas separation
Author(s) -
Dutta Agniva,
Bisoi Soumendu,
Mukherjee Rajdeep,
Chatterjee Rimpa,
Das Rajat K.,
Banerjee Susanta
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46658
Subject(s) - triphenylamine , thermal stability , glass transition , membrane , amine gas treating , solubility , materials science , polymer chemistry , gas separation , ultimate tensile strength , selectivity , condensation polymer , polyimide , tertiary amine , chemical engineering , polymer , chemistry , organic chemistry , composite material , layer (electronics) , catalysis , biochemistry , engineering
This article reports the synthesis and characterization of a series of new aromatic polyimides (PIs) having bulky tert butyl group containing propeller shaped triphenylamine unit in its structure. The PIs were prepared by the reaction of 4,4′‐diamino‐4″‐(2,4,6‐tri‐tert‐butylphenoxy) triphenylamine with different commercially available aromatic dianhydrides through the formation of corresponding poly(amic acid)s and subsequent thermal cycloimidization. The PIs showed high glass transition temperature ( T g up to 270 °C) and thermal stability ( T d 10 up to 475 °C). The PI membranes showed good mechanical properties with tensile strength up to 70 MPa, excellent separation performance [P(CO 2 ) = 100.8, P(O 2 ) = 40.4 barrer], and good permselectivity [P(CO 2 )/P(CH 4 ) = 50.9, P(O 2 )/P(N 2 ) = 7.6]. The membranes exhibited extremely high solubility selectivity for the CO 2 /CH 4 gas pair due to the strong affinity between CO 2 and nitrogen atoms of tertiary amine in triphenylamine. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46658.