Preparation of graft acrylic copolymers with a heterophase structure by latex-suspension polymerization

Abstract Polymerization of MMA in presence of a graft latex copolymer of butylacrylate(70% by weight) and MMA (30% by weight) has been investigated. The conditions in which particles of the emulsion-suspension copolymer form are defined. Electron microscopy and DTA have established that the copolymer particles have a heterophase structure. An equation is proposed for calculating the size of the dispersion drops in the system NMA-latex-water. Tests of the emulsion-suspension copolymer have been run with a maximum content of the latex copolymer (21% by weight) in the polymer-monomer composite. The impact strength of the material obtained was 10–12 kj/m 2 .