Synthesis of Monodisperse Cross-Linked Polystyrene Latexes Containing (Vinylbenzyl)trimethylammonium Chloride Units

Abstract

Monodisperse latexes were synthesized by copolymerization of 23–98% by weight styrene and 0–75% vinylbenzyl chloride with 1% divinylbenzene and 1% (vinylbenzyl)trimethylammoniurn chloride using 2, 2′-azobis(N,N′-dimethyleneisobutyramidine) dihydrochloride initiator at 60°C. Particle size in the range 100–200 nm in diameter was controlled via the amount of charged monomer used in the first stage of shot growth polymerization. Polydispersity indexes were Dw/Dn = 1.01. Treatment of the copolymers with trimethylamine produced latexes containing 1–60 mol % of (vinylbenzyl)trimethylammonium chloride repeat units. © 1993, American Chemical Society. All rights reserved.