Metastable solutions and interactions of decomposition products in porogen derived membranes

✍ Scribed by A. M. Eyal; D. Edelstein; B. Hazan; K. Hajdu

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 753 KB
• Volume: 46
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1992.070460821

✦ Synopsis

Small incompatible molecules formed on porogen decomposition were found to be metastably dissolved in Porogen Derived Membranes, confirming previous analysis.' Degrees of metastable dissolution are determined by polymer and porogen characteristics, by porogen content, and by decomposition parameters (characteristics of reagent, its concentration, and decomposition temperature). These parameters determine the characteristics of decomposition products ( DPs) formed, the rate of their formation, and the properties of the matrix through which they have to diffuse for phase separation. Extraction experiments indicated that, for many compositions, leaching out of DPs during contact with water is very slow. Porogen derived membranes are thus intermediate between polymeric membranes and supported liquid membranes, with the potential of combining high selectivity and reasonable stability. 0 John Wiley & Sons, Inc.