QUATERNIZED STYRENIC BLOCK COPOLYMERS AND METHODS OF PREPARATION THEREOF
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Dec 12, 2023
filing date -
Dec 13, 2022
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The disclosure relates to a quaternized styrenic block copolymer (QSBC) and a cross-linked QSBC (xQSBC). The QSBC comprises at least one block copolymer selected from a triblock copolymer, a tetrablock copolymer, a pentablock copolymer, and mixtures thereof. The block copolymer contains at least one block A or A′, each independently derived from a vinyl aromatic monomer and a block B derived from a conjugated diene monomer or a combination of a vinyl aromatic monomer and a conjugated diene monomer. At least one polymerized vinyl aromatic unit in the block A and/or A′ comprises a quaternary ammonium group. The xQSBC shows high ion conductivity, improved dimensional stability, and balanced mechanical properties. The QSBC has applications in anion exchange membranes (AEMs), fuel cell, electrolyzer, etc.
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