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Styrene–butadiene rubber membranes for the pervaporative separation of benzene/cyclohexane mixtures
Author(s) -
Benguergoura Hassiba,
Moulay Saad
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34105
Subject(s) - cyclohexane , membrane , pervaporation , styrene , polymer chemistry , styrene butadiene , natural rubber , chemistry , benzene , swelling , selectivity , permeation , chemical engineering , materials science , organic chemistry , copolymer , polymer , composite material , catalysis , biochemistry , engineering
Styrene–butadiene rubber membranes with methylene bridges, stemming from the concomitant in situ Friedel–Crafts alkylation during a chloromethylation reaction, were prepared and used in the pervaporative separation of benzene/cyclohexane mixtures. A set of four membranes with different crosslinking extents was achieved by the variation of the [Trimethylchlorosilane (TMCS)]/[Paraformaldehyde (PF)] molar ratios with respect to the styrene (St) unit. Study of the swelling of membranes by the mixture components individually and by their feed mixture compositions, 1 : 1 and 1 : 9, was conducted. The total flux ( J ) and the separation factor (α) were assessed as a function of the feed composition, temperature, and [St unit]/[TMCS]/[PF] molar ratios. The highest J and α measured in this study were 1401 g m −2 h −1 and 28.50, respectively. The diffusion selectivity was found to depend on the crosslinking extent of the membrane. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012