ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Oxidized poly(vinyl chloride) as a heterogeneous initiator of emulsion polymerization

V. Chrástová, D. Mikulášová, and P. Citovický

Department of Chemical Technology of Plastics and Fibres, Slovak Technical University, 812 37Bratislava

Abstract: Low-oxidized powdered polyvinyl chloride) (concentration of hydroperoxidic groups was 1.9 x 10^-2 mol O₂ kg^-1 PVC) was used as a heterogeneous initiator for the synthesis of high-molecular polystyrene or poly(methyl methacrylate) in emulsion. The influence of combination of four types of activator and two types of emulsifier on amount of the arising polymer was investigated. As for homopolymerization of styrene, the best results were achieved with an activator of the FeSO₄—Chelaton III type or activator consisting of FeSO₄ —triethylenetetramine in combination with a nonionic emulsifier. The FeSO₄ —triethylenetetramine activator is not suited for homopolymerization of methyl methacrylate in the presence of ionic as well as nonionic emulsifier. The influence of concentration of emulsifier and initiator on the course of polymerization of styrene was also investigated.

Full paper in Portable Document Format: 362a223.pdf

Chemical Papers 36 (2) 223–230 (1982)