Influence of Benzoyl Peroxide and Divinylbenzene Concentrations on the Properties of Poly(glycidyl methacrylate‐co‐divinylbenzene) Magnetic Microspheres

• Published in: Macromolecular reaction engineering Vol. 17; no. 4
• Main Authors: Formiga, Washington José Fernandes, Silva, Manoel Ribeiro da, Cunha, Henrique Almeida, Castanharo, Jacira Aparecida, Ferreira, Ivana Lourenço de Mello, Costa, Marcos Antonio da Silva
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01-08-2023
• Subjects: Benzoyl peroxide; cross‐linker; Divinylbenzene; glycidyl methacrylate; initiator; Magnetic measurement; Magnetic properties; Microspheres; Suspension polymerization; Synthesis; Thermal analysis; Thermal stability
• ISSN: 1862-832X; 1862-8338
• DOI: 10.1002/mren.202200070

In this work, the synthesis of magnetic microspheres of poly(glycidyl methacrylate‐co‐divinylbenzene) via suspension polymerization is reported. The concentrations of divinylbenzeneand benzoyl peroxide in the microspheres synthesis are studied. The microspheres, characterized by thermal analysis , scanning electron microscopy, vibrating sample magnetometry , and light scattering detection , show good morphological control and thermal stability. This material presents a narrow size range and an appreciable fraction of superparamagnetic particles. The increase in divinylbenzene concentration can cause a decrease in the mean diameter of the microspheres. On the other hand, the increase in benzoyl peroxide concentration causes an increase in the mean diameter of the microspheres.
The synthesis of magnetic microspheres of poly(glycidyl methacrylate‐co‐divinylbenzene) via suspension polymerization is described. The increase in DVB concentration can cause a decrease in the mean diameter of the microspheres. On the other hand, the increase in BPO concentration causes an increase in the mean diameter of the microspheres. The saturation magnetization (Ms) is near 5.17 emu g−1, with superparamagnetic particles.