Premium
Monomer atomic configuration as key feature in governing the gas transport behaviors of polyimide membrane
Author(s) -
Tan P. C.,
Ooi B. S.,
Ahmad A. L.,
Low S. C.
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.46073
Subject(s) - polyimide , monomer , membrane , polymer chemistry , materials science , steric effects , molecular dynamics , chemical engineering , polymer , chemistry , computational chemistry , nanotechnology , organic chemistry , composite material , layer (electronics) , biochemistry , engineering
Although the molecular design of polyimide has been extensively investigated, the role of monomer's atomic configuration in controlling the structure of polyimide membrane hence its gas transport behaviors remains relatively uncertain. Therefore, a series of polyimides with different monomer combinations were synthesized to determine the crucial features of monomer that can impose great influence on membrane properties such as the fractional free volume (FFV). The results showed that the polyimide chain length ( M w ) depended strongly on the monomer reactivity, which was primarily controlled by the steric hindrance of monomers' substituent instead of their electronic nature. In addition, the polarity and atomic configuration of monomer were found to be the two dominant factors in governing the membrane FFV. A polyimide model was also constructed and validated by molecular dynamics simulation to predict the gas transport behaviors (solubility and diffusivity) of copolyimide membranes. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46073.