Bromohydration and bromination of the pendant vinylbenzene groups of commerical poly(divinylenzence-co-ethylvinylbenzene) resins with subsequent modifications of the (1,2,-dibromoethyl)benzene groups:

摘要

Amberlite XAD-4, the commecial form of poly(divinylbenzene-co-ethylvinylbenzene), was modified by bromohydration and bromination of its pendant vinylbenzene groups. The vinylbenzene groups were completely converted to (1,2,-dibromoethy)benzene groups, with a degree of functionalization of 35/100. Bromohydration of XAD-4 created a resin with (1-hydroxy-2-bromoethy)benzene groups, with a degree of functionalization of 24/100. Further modifications to the (1,2-dibromoethy)benzene groups of the brominated resin were done using throurea, which led to a resin with a mixture of functional groups, including isothiouronium bromide; and using N, N-dimethylthioformamide with subsequent methanolysis, which led to a resin with thiol groups.