Styrene-divinylbenzene copolymer

Styrene-divinylbenzene copolymers (cross-linked polystyrene, abbreviations PS-X , CAS Number 9003-70-7) obtained when styrene with divinylbenzene (DVB) together polymerized is. The DVB forms bridges between the polystyrene macromolecules and thus ensures permanent dimensional stability. This bridging is also called networking .

Depending on the additional amount of DVB, different product properties can be set. The DVB copolymers form the matrix for ion exchange polymers , which can have basic or acidic properties by modifying the polymer chains.

presentation

It is represented by radical polymerization of styrene and divinylbenzene. Crosslinking occurs through the latter, as it has two reactive vinyl groups .

use

The sulfonation of polystyrene-divinylbenzene copolymer gives poly (styrene-co-divinylbenzene) sulfonic acids which act as cation exchangers.

Basic ion exchangers that act as anion exchangers are obtained by chloromethylation of polystyrene-divinylbenzene copolymer and subsequent substitution with quaternary ammonium groups .

Individual evidence

1. ^ Joachim Weiss: Ion chromatography . Wiley-VCH, Weinheim 2001, ISBN 9-783-52-728702-4.