3-[Tris-(trimethylsiloxy)silyl] propyl acrylate (TRIS-A) was copolymerized with poly(ethylene glycol) diacrylate (PEGDA), and the gas transport and physical properties of the resulting copolymers were characterized. Introduction of TRIS-A led to increased polymer fractional free volume and strong broadening of the glass-rubber relaxation without a significant shift in glass transition temperature in samples containing up to 80wt% TRIS-A. Gas permeability increased significantly as TRIS-A content increased: for instance, addition of 80wt% TRIS-A increased CO2 permeability from 110 to 800barrer. The strongly non-polar character of TRIS-A, however, resulted in progressively lower CO2 affinity for the polymer network, leading to decreased CO2/light gas selectivity with increasing TRIS-A content.
|Number of pages||12|
|Journal||Journal of Membrane Science|
|State||Published - Sep 2010|
Bibliographical noteFunding Information:
We gratefully acknowledge partial support of this work by the U.S. Department of Energy (Grant DE-FG02-02ER15362 ) and by the U.S. National Science Foundation (Grant CBET-0515425 ). Activities at the University of Kentucky were supported in part by a grant from the Kentucky Science and Engineering Foundation as per Grant Agreement KSEF-148-502-05-130 with the Kentucky Science and Technology Corporation. Stephan Smith was supported by an Undergraduate Research Suppplement through the American Chemical Society Petroleum Research Fund ( PRF #45353-AC7 ).
- Carbon dioxide
- Cross-linked poly(ethylene oxide)
- Membrane gas separation
ASJC Scopus subject areas
- Materials Science (all)
- Physical and Theoretical Chemistry
- Filtration and Separation