Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5181603 | Polymer | 2014 | 8 Pages |
Cationic copolymerizations of vinyl ether monomers having a triethylene glycol segment [2-(2-(2-methoxyethoxy)ethoxy)ethyl vinyl ether (TEGMVE)] with vinyl ether monomer having a methacrylate unit [2-(2-vinyloxyethoxy)ethyl methacrylate: VEEM] were performed to obtain crosslinkable copolymers [poly(TEGMVE-VEEM)] with different composition rates. Methacrylate groups in poly(TEGMVE-VEEM)s partially reacted to give crosslinked polymer membranes. The free-standing membranes of poly(TEGMVE-VEEM)s obtained at monomer feed ratios of 6:1, 10:1, and 14:1 were too brittle, while their composite membranes with PTFE sheet were tough enough to measure gas permeability. All the membranes of poly(TEGMVE-VEEM) showed high CO2/N2 selectivity (PCO2/PN2Â =Â 35-54) because of their high CO2 solubility selectivity (SCO2/SN2Â =Â 38-61). The gas permeability increased as the composition ratio of VEEM decreased, and the composite membrane of poly(TEGMVE-VEEM)(14:1) showed the highest CO2 permeability (PCO2Â =Â 410Â barrers) among the present polymer membranes.
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