Effect of synthesis conditions on the properties of magnetic crosslinked polystyrene microspheres

Abstract In this work, magnetic polymeric microspheres were prepared through the copolymerization of styrene and divinylbenzene in the presence of magnetite synthesized in our laboratory. The effects of magnetite modification with oleic acid, stirring speed, initiator concentration and stabilizer co...

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Bibliographic Details
Published in:	Polímeros, ciência e tecnologia Vol. 34; no. 3
Main Authors:	Bouças, Thiago Alexandre de Oliveira, Costa, Marcos Antonio da Silva, Cunha, Henrique Almeida, Silva, Manoel Ribeiro da, Hui, Wang Shu, Castanharo, Jacira Aparecida
Format:	Journal Article
Language:	English
Published:	Associação Brasileira de Polímeros 01-01-2024
Subjects:	magnetic properties magnetite styrene-divinylbenzene copolymer suspension polymerization
Online Access:	Get full text
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Summary:	Abstract In this work, magnetic polymeric microspheres were prepared through the copolymerization of styrene and divinylbenzene in the presence of magnetite synthesized in our laboratory. The effects of magnetite modification with oleic acid, stirring speed, initiator concentration and stabilizer concentration on the particles’ properties were studied. The magnetic microspheres were characterized according to morphology, thermal stability, particle size and distribution, and magnetic properties. The microspheres had spherical shape, micrometric size and superparamagnetic properties. Particle size was mainly affected by stirring speed, while particle size dispersion was strongly affected by initiator and stabilizer concentrations. The saturation magnetization of the microspheres was similar to the values reported in the literature for microspheres with the same content of magnetic material. The modification with oleic acid promoted the incorporation of magnetic material.
ISSN:	0104-1428 1678-5169
DOI:	10.1590/0104-1428.20230113