Preparation of macroporous styrene – divinyl benzene copolymers

Abstract EN

Suspension polymerization technique is used for the preparation of macro porous Styrene- Divinylbenzene (S-DVB) copolymer beads with different mole percent of divinylbenzene content in the presence of different contents and types of diluents which gives the porosity to the copolymer.

It was found that increasing the percent of DVB with fixing the amount of toluene diluents (72%) results in a decrease in toluene regain (T.

R.) values with increasing the degree of porosity.

Increasing the percent of diluents with fixing the amount of DVB (16%) results in an increase in (T.

R.) values with a decrease in the degree of porosity.

Changing the type of diluents also has an effect on the physical properties of the prepared copolymer.

Addition of polystyrene with toluene results in an increase in the degree of porosity.

The other physical properties of the copolymer, apparent density and void fraction are also measured.

These copolymers are used as the base for the preparation of porous cation exchangers (by suffocation) and anion exchangers (by chloromethylation and amination) under controlled experimental conditions.

The physical properties of the prepared ion exchangers were also measured, with total exchange capacity (T.

E.

C.) and the rate of ion exchange (t 1 / 2).