Reversible Addition–Fragmentation Chain Transfer Polymerization of Vinyl Acetate in Bulk and Suspension Systems

摘要: Suspension and bulk polymerizations of vinyl acetate (VAc) are performed in several experimental conditions, using cyanomethyl methyl(phenyl) carbamodithioate as the chain transfer agent (CTA). The polymerization kinetics monitored batch for polymerizations, showing an inhibitory period at beginning reaction runs, despite particular conditions used. More accurate control over molecular properties synthesized poly(vinyl acetate) (PVAc) is achieved when high concentrations CTA Similar applied to prepare PVAc particles via suspension VAc presence small amounts CTA. It possible produce spherical with a narrow particle size distribution predominant morphology. Although reactions yield low weight properties, it use macro-CTAs promote extension extend length PVAc.