Characteristics of permeation and separation of dimethyl acrylamide-methyl methacrylate random and graft copolymer membranes for a benzene/cyclohexane mixture |
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Authors: | Kuniaki Inui Haruo Okumura Takashi Miyata Tadashi Uragami |
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Affiliation: | (1) Chemical Branch, Faculty of Engineering, High-Tech Research Center, Kansai University, Suita, Osaka 564-80, Japan, JP |
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Abstract: | When a benzene/cyclohexane mixture was permeated through poly(dimethyl acrylamide-random-methyl methacrylate) (DMAA-r-MMA)
and poly(dimethyl acrylamide)-graft-poly(methyl methacrylate) (DMAA-g-MMA) membranes by pervaporation, the benzene-permselectivity
of the DMAA-r-MMA membrane changed from the diffusivity selectivity to the solubility selectivity with increasing DMAA content
but DMAA-g-MMA membranes with a high DMAA content had the higher apparent diffusivity selectivity than the apparent solubility
selectivity. Furthermore, the apparent solubility selectivity for a benzene/cyclohexane mixture between the DMAA-r-MMA membrane
and the DMAA-g-MMA membrane with a high DMAA content was remarkably different. These results were attributed to the difference
of structure between the copolymers.
Received: 27 August 1997/Revised version: 22 October 1997/Accepted: 30 October 1997 |
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