Emulsion polymerization synthesis of cationic polymer latex in an ultrasonic field

Abstract

Poly(methyl methacrylate) and poly(butyl acrylate) lattices have been synthesized under ultrasonic irradiation in the presence of a cationic surfactant, dodecyltrimethylammonium chloride. The polymerization of oil-in-water emulsions of monomeric species was carried out at 30°C (±5°C) in the absence of a chemical initiator. The lattices were formed as stable dispersions with particle diameters spanning the range of 40-150 nm and with polymer molecular weights greater than 106 g mol-1. The results obtained strongly support a polymerization process involving a miniemulsion system, in which continuous nucleation of particles takes place throughout the monomer to polymer conversion reaction. © 20..