Effect of the ethylene content of poly(ethylene-co-vinyl alcohol) on the formation of microporous membranes via thermally induced phase separation
| Autor: | Masaaki Tearamoto, Kiyotaka Kobayashi, Hideto Matsuyama, Hitoshi Tsuruta, Taisuke Maki |
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| Rok vydání: | 2001 |
| Předmět: |
Vinyl alcohol
Morphology (linguistics) Ethylene Materials science Polymers and Plastics Crystallization of polymers Alcohol General Chemistry Permeance Surfaces Coatings and Films law.invention chemistry.chemical_compound Membrane chemistry Chemical engineering law Polymer chemistry Materials Chemistry Crystallization |
| Zdroj: | Journal of Applied Polymer Science. 82:2583-2589 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.2109 |
| Popis: | Porous poly(ethylene-co-vinyl alcohol) (EVOH) membranes were prepared via thermally induced phase separation. The effect of the EVOH ethylene content on the membrane morphology and solute rejection property was investigated. For EVOHs with ethylene contents of 27–44 mol %, polymer crystallization (solid–liquid phase separation) occurred, and the membrane morphology was the particulate structure. However, the liquid–liquid phase separation occurred before crystallization for EVOH with a 60 mol % ethylene content. Cellular pores were formed in this membrane. For the particulate membranes, higher solute rejection and lower water permeance were obtained for EVOH with a lower ethylene content. The membrane formed by the liquid–liquid phase separation showed a sharper solute rejection change with a change in the solute radius than the particulate membranes did. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2583–2589, 2001 |
| Databáze: | OpenAIRE |
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