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Selective separation of water from aqueous alcohol mixtures through functionalized syndiotactic poly(styrene‐ co ‐4‐methylstyrene) membranes by pervaporation
Author(s) -
Li ChiLan,
Wang YiChieh,
Kao SeTsung,
Fan ShuChin,
Lee KueirRarn,
Lai JuinYih
Publication year - 2002
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.11204
Subject(s) - pervaporation , membrane , materials science , styrene , chemical engineering , polystyrene , polymer chemistry , permeation , aqueous solution , copolymer , polymer , organic chemistry , chemistry , composite material , biochemistry , engineering
The pervaporation performances of a series of functionalized syndiotactic poly(styrene‐ co ‐4‐methylstyrene) (SPSM) membranes for various alcohol mixtures were investigated. The syndiotactic polystyrene copolymers, poly(styrene‐ co ‐4‐methylstyrene) (SPSM), were prepared by styrene with 4‐methylstyrene using a Cp*Ti(OCH 3 ) 3 /methyl aluminoxane (metallocene/MAO) catalyst. The effect of functionalization on the thermal properties and polymer structure of the SPSM membranes were also investigated. The crystallinity of the functionalized SPSM membrane is lower than that of the unfunctionalized SPSM membranes. The water molecules preferentially permeate through the SPSM membranes. Compared with unfunctionalized SPSM membranes, the functionalized SPSM membrane effectively increases the membrane formation performances and the pervaporation performances. The optimun pervaporation performance (a separation factor of 510 and permeation rate of 220 g/m 2 h) was obtained by the bromination of SPSM (SPSMBr) membrane with a 90 wt % aqueous ethanol solution. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2247–2254, 2002