期刊
POLYMER
卷 52, 期 18, 页码 4073-4082出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2011.07.002
关键词
Thermal analysis; Polyimide membrane; Gas separation
资金
- KAUST (King Abdullah University of Science and Technology)
- U.S. Department of Energy [DE-FG02-04ER15510]
- U.S. Department of Energy (DOE) [DE-FG02-04ER15510] Funding Source: U.S. Department of Energy (DOE)
Seven polyimides based on (4,4'-hexafluoroisopropylidene) diphthalic anhydride, 6FDA, with different chemical structures were synthesized in a single pot two-step procedure by first producing a high molecular weight polyamic acid (PAA), followed by reaction with acetic anhydride to produce polyimide (PI). The resulting polymers were characterized using thermal analysis techniques including TGA, derivative weight analysis, TGA-MS, and DSC. The decarboxylation-induced thermal cross-linking, ester cross-linking through a diol, and ion-exchange reactions of selected polyimide membranes were investigated. Cross-linking of polymer membranes was confirmed by solubility tests and CO(2) permeability measurements. The thermal analysis provides simple and timesaving opportunities to characterize the polymer properties, the ability to optimize polymer cross-linking conditions, and to monitor polymer functionalization to develop high performance polymeric membranes for gas separations. (C) 2011 Elsevier Ltd. All rights reserved.
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