Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 112, Issue 1, Pages 89-98Publisher
WILEY
DOI: 10.1002/app.29403
Keywords
magnetic; polymer microsphere; miniemulsion polymerization
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Funding
- National Natural Science Foundation of China [20876100, 20476065, 20736004]
- Scientific Research Foundation for the ROCs of State Education Ministry
- Chinese Academy of Science [2003-5]
- CAS [04-309]
- Soochow University
- Nanjing Medical University [NY0586]
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Magnetic poly(methyl methacrylate) (PMMA) microspheres were prepared by double-miniemulsion polymerization. First, oleic acid coated magnetite particles synthesized by means of coprecipitation were dispersed into octane to obtain a ferrofluid. The ferrofluid and MMA were emulsified to form O/W emulsion, respectively. Subsequently two miniemulsions were mixed together for polymerization. The obtained magnetic polymer particles were characterized by, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction, and thermogravimetry. The results showed that oleic acid coated magnetite particles were well encapsulated in PMMA. The effects of initiator dosage and monomer concentration on the conversion of MMA were also investigated. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 112:89-98, 2009
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