Influence of TRIS-based co-monomer on structure and gas transport properties of cross-linked poly(ethylene oxide)

Victor A. Kusuma, Benny D. Freeman, Stephan L. Smith, Alexander L. Heilman, Douglass S. Kalika

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27 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)25-36
Number of pages12
JournalJournal of Membrane Science
Issue number1-2
Publication statusPublished - Sep 2010
Externally publishedYes


  • Carbon dioxide
  • Cross-linked poly(ethylene oxide)
  • Membrane gas separation
  • TRIS

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