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Efficient, “one‐pot” synthesis of suspension crosslinked sulfonated polystyrene via a Friedel–Crafts reaction
Author(s) -
Theodoropoulos A. G.,
Bouranis D. L.,
Valkanas G. N.
Publication year - 1992
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.1992.070460817
Subject(s) - sulfuric acid , oleum , friedel–crafts reaction , polystyrene , ion exchange resin , suspension (topology) , catalysis , polymer chemistry , ion exchange , sulfonic acid , chemistry , chemical engineering , materials science , ion , organic chemistry , polymer , mathematics , homotopy , pure mathematics , engineering
A suspension technique leading to macronet ionic resins is described based on a single reactor process. The procedures demonstrate sulfuric acid as a polar suspending medium that can act as a sulfonating agent, a Friedel–Crafts catalyst, and a crosslinking agent. The sulfonation reaction was finally completed using sulfuric acid excess, or oleum 65%. High yields were obtained for the crosslinking and the sulfonation reaction, while the final products were characterized by using ion‐exchange capacity measurements, U.V. spectra, and determination of the degree of crosslinking. The number average molecular weight between crosslinks and the ion‐exchange capacity H + →Na + of the resins was decreasing by increasing the nominal crosslinking ratio. © 1992 John Wiley & Sons, Inc.