On the graft polymerization of styrene and acrylonitrile onto polybutadiene in the presence of vinyl acetate. I. Preparation of graft polymers

Abstract

SYNOPSISIn order to modify the graft polymers of styrene and acrylonitrile onto polybutadiene ( ABS polymers), the preparation of the graft products of styrene, acrylonitrile, and vinyl acetate onto polybutadiene rubber by emulsion polymerization was described and theoretically studied up to a high degree of conversion. Depending on the residual monomer content of the products, the polymer composition obtained in the experiment was compared with the theoretical one for the substitution of certain quantities of styrene, acrylonitrile, or styrene and acrylonitrile by vinyl acetate in the mass ratio of 3 : 1. Deviations were discussed. The specific viscosity of the polymers of styrene, acrylonitrile, and vinyl acetate separated from the elastomer phase, considerably decreases during the substitution of acrylonitrile by increased vinyl acetate quantities.

Removal of Volatile Organic Compounds from Bulk and Emulsion Polymers: A Comprehensive Survey of the Existing Techniques

“…Usually, the reactive comonomer is added when high polymerization conversions are achieved, but there are examples in which it was added at the beginning of the main polymerization reaction. 71 The authors observed a decrease in the viscosity of the emulsion while increasing the concentration of the scavenger monomer (vinyl acetate) in an ABS system. However, the final concentration of residual monomers (acrylonitrile, butadiene, and styrene) was not reported in the publication.…”

“…There are several examples in which a reactive comonomer was added to a latex emulsion to reduce the concentration of residual monomers, as for example in acrylonitrile–methylstyrene, acrylonitrile–butadiene–styrene (ABS), styrene–butadiene rubbers (SBR), or vinyl acetate based polymers. Usually, the reactive comonomer is added when high polymerization conversions are achieved, but there are examples in which it was added at the beginning of the main polymerization reaction . The authors observed a decrease in the viscosity of the emulsion while increasing the concentration of the scavenger monomer (vinyl acetate) in an ABS system.…”

Grafting behavior of n‐butyl acrylate onto poly(butadiene‐co‐styrene) latexes

“…However, because a rubber/glass core or the shell materials, were usually acrylic core/shell composite latex system is of general inpolymers. A rubber/rubber core/shell latex sysdustrial interest, almost all of these studies used tem involving PBd-based elastomers, such as a methyl methacrylate (MMA), 1 styrene (S), 2 stypoly(butadiene)co-styrene)/poly(butyl acrylate)-rene/acrylonitrile (S/AN), 3 or S/MMA 4 as the [P(Bd-S)/PBA] latex system, has rarely been resecond stage monomers. In these applications, ported.…”