N-BROMO-POLY(STYRENE-CO-DIVINYLBENZENE) SULFONAMIDE METAL-SALTS - SYNTHESIS AND BASIC PROPERTIES

Macromolecular pendant group N-monobromosulphonamide metal salts P-SO2NBr-M+ having a macroporous styrene-divinylbenzene matrix structure have been obtained by two methods: a) by the action of aqueous metal hypobromites on the appropriate macromolecular pendant group sulphonamide, and b) by the action of an aqueous metal bromide on the appropriate macromolecular N-chlorosulphonamide metal salt. In each case the sodium salt product was obtained with a 100% functional yield and it contained 2.1 mmol . g-1 -SO2NBr-Na+ groups, i.e., 4.2 meq . g-1 of active bromine. The stability of the resin was investigated in the range 20-100-degrees-C in the dry state as well as in aqueous media. A thermoanalysis (TG, DTG, and DTA curves) was carried out up to 1000-degrees-C and its course was interpreted. The resin has brominating, oxidative, microbiocidic, and ion-exchanging properties. It reacts in a reversible way: after the loss of the active bromine, it can be reactivated again.