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Characteristics of Permeation and Separation for Aqueous Ethanol Solutions Through Methyl Methacrylate-dimethylsiloxane Graft Copolymer Membranes by Takashi Miyata; Toru Takagi; Takeshi Kadota; Tadashi Uragami is a Materials Science article available to read on EtoBox.

What is Characteristics of Permeation and Separation for Aqueous Ethanol Solutions Through Methyl Methacrylate-dimethylsiloxane Graft Copolymer Membranes about?

Poly(methy1 methacrylate) with oligodimethylsiloxane grafts (MMA-g-DMS) was prepared by copolymerization of a dimethylsiloxane (DMS) macromonomer with methyl methacrylate (MMA). Two glass transition temperatures (T,) were observed at about 120°C and -127 "C in all graft copolymer membranes. Transmission electron micrographs demonstrate that the MMAg-DMS membranes show microphase separation. When an aqueous solution of 10 wt.-Vo ethanol was applied to permeations through the MMA-g-DMS membranes by pervaporation, the ethanol concentration in the permeate and the permeation rate increased drastically with the DMS content in the copolymer. Especially, while at a DMS content of less than 40 mol-Vo preferentially water permeates from an aqueous solution of 10 wt.-Yo ethanol, the membranes with more than about 40 mol-Yo of DMS show ethanol-permselectivity. The relationship between the microphaseseparated structures and the permeation characteristics for an aqueous ethanol solution is discussed.

Who reads Characteristics of Permeation and Separation for Aqueous Ethanol Solutions Through Methyl Methacrylate-dimethylsiloxane Graft Copolymer Membranes?

Author

Takashi Miyata; Toru Takagi; Takeshi Kadota; Tadashi Uragami

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1022-1352)

Published

1995

Language

EN

Field

Materials Science (Physical Sciences)