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The functionalization of a crosslinked chloromethylated polystyrene 8% divinylbenzene copolymer with phosphonic ester groups is detailed. The reacton conditions were studied in order to determine the optimal conditions for obtaining only diesters. A statistical method for the calculation of the fraction of repetive units for the inited and final resin is proposed.

Styrene-divinylbenzene copolymer grafted with phosphonic acid dialkyl esters