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1-ARYL CYCLIC SULFONIUM COMPOUNDS, POLY (ARYL CYCLIC SULFONIUM) SALTS AND MODIFICATION OF CARBOXY-CONTAINING POLYMERS BY TREATMENT WITH CYCLIC SULFONIUM COMPOUNDS
1-ARYL CYCLIC SULFONIUM COMPOUNDS, POLY (ARYL CYCLIC SULFONIUM) SALTS AND MODIFICATION OF CARBOXY-CONTAINING POLYMERS BY TREATMENT WITH CYCLIC SULFONIUM COMPOUNDS