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

Oxidized Powdered Polypropylene Initiated Emulsion Copolymerization of Methyl Methacrylate with Acrylonitrile

V. Chrástová and P. Citovický and J. Sádecká

Department of Plastics and Rubber, Faculty of Chemical Technology, Slovak Technical University, CS-812 37 Bratislava

Abstract: Emulsion copolymerization of acrylonitrile (AN) with methyl methacrylate (MMA) initiated by hydroperoxide groups bonded to powdered isotactic polypropylene in the presence of Fe²⁺/EDTA activator and nonionic ethylene oxide-type emulsifier was investigated at 30°C. As found, AN does almost not undergo polymerization under the given conditions, whereas MMA forms a homopolymer. The AN with MMA copolymerization rate, as well as [eta] of the P(AN-co-MMA) copolymer formed, decreases in relation to the increasing concentration of AN in the comonomer mixture. The composition change of P(AN-co-MMA) copolymers was examined in regard to the monomer content in the feed and changes in the copolymer composition with conversion were investigated. Reactivity ratios were estimated from the results of analysis of the P(AN-co-MMA) copolymer; under the given conditions of emulsion polymerization initiated by hydroperoxide groups bonded to a solid polymer carrier, the r_AN = 0.09 and r_MMA = 0.86 values were found.

Full paper in Portable Document Format: 465a297.pdf

Chemical Papers 46 (5) 297–300 (1992)