Phase separation in polyetherimide/solvent/nonsolvent systems and membrane formation

Journal of Applied Polymer ScienceVolume 71, Issue 11 p. 1789-1796 Phase separation in polyetherimide/solvent/nonsolvent systems and membrane formation Dongliang Wang, Dongliang Wang Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Search for more papers by this authorK. Li, K. Li Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Search for more papers by this authorW. K. Teo, Corresponding Author W. K. Teo Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore119260===Search for more papers by this author Dongliang Wang, Dongliang Wang Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Search for more papers by this authorK. Li, K. Li Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Search for more papers by this authorW. K. Teo, Corresponding Author W. K. Teo Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260Department of Chemical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore119260===Search for more papers by this author First published: 04 February 1999 https://doi.org/10.1002/(SICI)1097-4628(19990314)71:11<1789::AID-APP8>3.0.CO;2-CCitations: 27Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Phase separation phenomena of polyetherimide (PEI)/solvent/nonsolvent systems were investigated by measuring their precipitation values over the temperature range from 20 to 50°C. The solvents used are N-methyl-2-pyrrolidone (NMP), dimethylacetamide (DMAC), and dimethylformamide (DMF). Nine nonsolvents were employed including water, methanol, ethanol, 1-propanol, 2-propanol, acetic acid, propionic acid, ethylene glycol, and diethylene glycol. Based on the measured precipitation values, critical solubility parameters for PEI were calculated, and the partial solubility boundary for PEI was obtained in a two-dimensional solubility parameter coordinate graph. The relationship between solvent strength and membrane structure was examined using PEI hollow-fiber membranes prepared from binary polymer solutions containing NMP, DMAC, and DMF as solvents. Water was used both as internal and external coagulants. The cross-sectional structure and gas permeation properties of these hollow fibers were examined. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1789–1796, 1999 Citing Literature Volume71, Issue1114 March 1999Pages 1789-1796 RelatedInformation