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These polymers exhibit good solubility in common organic solvents, high thermal stability, and H3PO4 uptakes of >300 wt %. However, replacement of the phenylphosphine oxide group with a more commercially viable sulfone group resulted in polymers with low solubility. This groups¡¯ novel bisphenol could be copolymerized with other bisphenols to give high molecular weight polymers, but H3PO4 uptakes decreased.

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