Modified sulfonated block copolymers and the preparation thereof
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United States of America Patent
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Jan 9, 2018
Grant Date -
Jan 17, 2013
app pub date -
Jul 12, 2011
filing date -
Jul 12, 2011
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Abstract
Described herein are modified sulfonated block copolymers which comprise at least two polymer end blocks A and at least one polymer interior block B, wherein each A block contains essentially no sulfonic acid or sulfonate functional groups and each B block comprises sulfonation susceptible monomer units and, based on the number of the sulfonation susceptible monomer units, from about 10 to about 100 mol % of a functional group of formula (I)
or of a salt thereof, methods of making them as well as methods of using them, e.g., as membrane materials for electrically or osmotically driven applications.
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