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

Emulsion polymerization in the presence of inorganic material

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

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

Abstract: The possibility was studied of using the synthetic inorg. zeolites Potasit (I) and Calsit (II), γ-Al₂O₃, and the metal oxides ZnO, MgO, NiO, CuO, Al₂O₃, TiO₂, and PbO₂ as heterogeneous initiators for homopolymn. of styrene or Me methacrylate (III) in an emulsion polymn. system contg. a nonionic emulsifier and triethylenetetramine as activator. I and II can be used as initiators and are more active after contact with O contg. O₃; the duration of the contact, as well as the concn. of the activator used, influence the yield of the polymer. Of the metal oxides studied as heterogeneous initiators, only Al₂O₃ and TiO₂ were not suitable; with these polymn. under the given conditions did not take place with either monomer. Treatment of the metal oxides in an O atm. enriched with O₃ did not influence the polymn. rate. It was found that polymn. of III does not proceed in the dark in the presence of ZnO or MgO which indicates that these oxides behave as photosensitizers.

Full paper in Portable Document Format: 374a475.pdf

Chemical Papers 37 (4) 475–483 (1983)