I&EC 135 |
| Solubility measurements were conducted via a magnetic suspension balance for carbon dioxide in polymers synthesized from ionic liquids, poly(p-vinylbenzyltrimethyl ammonium tetrafluoroborate), P[VBTMA][BF4] for short, and poly(1-(p-vinylbenzyl)-3-methyl-imidazolium tetrafluoroborate), P[VBMI][BF4] for short, at 25, 50, and 75 °C and up to 180 bar. The accurate performance of the magnetic suspension balance was verified by comparing our CO2 solubility data for bisphenol-A polysulfone with literature data. At low pressures (up to 15 bar) the solubility data for all three polymer–gas systems show typical glassy behavior modeled with a dual-mode sorption model. At high pressures (up to 180 bar) the apparent solubility of the two ionic polymers approaches asymptotic values. Pressure DSC data obtained for either ionic polymer show that each ionic polymer remains glassy when exposed to CO2 at pressures up to 70 bar. The CO2 solubility in the P[VBTMA][BF4] is higher than that in bisphenol-A polysulfone at the same temperature and pressure. |
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Ionic Liquids: Not Just Solvents Anymore OR Ionic Liquids: Parallel Futures (Sponsored by Green Chemistry and Engineering, Separation Science and Technology and Novel Chemistry with Industrial Applications Sub-Divisions)
8:00 PM-10:00 PM, Sunday, 26 March 2006 Georgia World Congress Center -- Ex. Hall B4, Poster
Division of Industrial and Engineering Chemistry |