Synthesis of monodisperse, magnetic latex particles with polystyrene core

Shunchao Gu, Toshiaki Shiratori, Mikio Konno

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


A novel method for producing monodisperse, submicronsized magnetic latex particles is described. The method provides coating of polymer particles with surface-modified magnetic particles during soap-free polymerization. Experiments were performed with styrene monomer, potassium persulfate initiator, Fe3O4 magnetic particles, and silane-coupling reagents of methacryloxypropyltrimethoxysilane (MPTMS) and methacryloxypropyldimethoxysilane (MPDMS). The morphology of the magnetic particles depended on the silane-coupling reagents. Use of the tri-functional coupling reagent MPTMS produced particles having a disk-like or concave-like shape, whereas use of the di-functional coupling reagent MPDMS produced spherical particles that had a coefficient of variation of 4.4%, which was much smaller than the standard criteria of monodispersity, 10%.

Original languageEnglish
Pages (from-to)1076-1081
Number of pages6
JournalColloid and Polymer Science
Issue number11
Publication statusPublished - 2003 Oct
Externally publishedYes


  • Heterogeneous coagulation
  • Magnetic latex particle
  • Particle shape
  • Silane-coupling reagent
  • Soap-free polymerization

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry


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