SYNTHESIS AND BASIC CHARACTERIZATION OF A MACROMOLECULAR DIBROMOAMINE - N,N-DIBROMO-POLY(STYRENE-CO-DIVINYLBENZENE)SULFONAMIDE

A macromolecular-pendent-group N,N-dibromosulfonamide ([P]-SO2NBr2) having a macroporous styrene-divinylbenzene matrix structure has been obtained by three methods: by the action of (a) bromine in aqueous medium and (b) aqueous metal hypobromites in acidic medium, on the appropriate macromolecular-pendent-group sulfonamide, and by (c) the action of an aqueous metal bromide on the appropriate macromolecular N,N-dichlorosulfonamide. In the best case the product was obtained with nearly 100% functional yield and it contained 2.4 mmol g-1 -SO2NBr2 groups, i.e. ca. 0.38 g 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. Thermoanalysis (thermogravimetric, differential thermogravimetric and differential thermal analysis curves) was carried out up to 1000-degrees-C and its course was interpreted. The resin has brominating, oxidative and microbiocidal properties. It reacts in a reversible way: after loss of the active bromine, it can be reactivated again.