Premium
Effects of crosslinking modification on the O 2 /N 2 separation characteristics of poly(phenyl sulfone)/poly(bisphenol A‐ co ‐4‐nitrophthalic anhydride‐ co ‐1,3‐phenylenediamine) blend membranes
Author(s) -
Weng TzuHsiang,
Tseng HuiHsin,
Wey MingYen
Publication year - 2009
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.31455
Subject(s) - crystallinity , selectivity , membrane , materials science , polymer chemistry , sulfone , fourier transform infrared spectroscopy , bisphenol a , chemical engineering , chemistry , organic chemistry , composite material , epoxy , catalysis , biochemistry , engineering
A series of blend membranes of poly(phenyl sulfone) (PPSU) with poly(bisphenol A‐ co ‐4‐nitrophthalic anhydride‐ co ‐1,3‐phenylenediamine) (PBNPI) were prepared through a solution casting method. This was done to examine the permeation characteristics of oxygen and nitrogen. The effect of the PPSU/PBNPI ratio on the membrane structure and O 2 /N 2 separation performance were investigated. The results show that the permeability increased remarkably with the content of PPSU, whereas the selectivity decreased slightly. To enhance the selectivity of O 2 /N 2 , the blend membranes were further crosslinked with a p ‐xylylenediamine agent via the immersion method. According to the Fourier transform infrared analysis, the NH group was formed on the imide group of PBNPI. Therefore, we suggest that during the crosslinking modification, the PBNPI served as a crosslinkable polymer; this resulted in increased crosslinking efficiency with PBNPI content. The high‐resolution X‐ray diffraction and melting point method results show that crosslinking modification improved the selectivity with an acceptable loss in permeability along with increased crystallinity. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010