Colloid and Polymer Science

, Volume 281, Issue 11, pp 1076–1081

Synthesis of monodisperse, magnetic latex particles with polystyrene core

Original Contribution

DOI: 10.1007/s00396-003-0883-4

Cite this article as:
Gu, S., Shiratori, T. & Konno, M. Colloid Polym Sci (2003) 281: 1076. doi:10.1007/s00396-003-0883-4


A novel method for producing monodisperse, submicron-sized 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%.


Soap-free polymerizationMagnetic latex particleSilane-coupling reagentHeterogeneous coagulationParticle shape

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  1. 1.Department of Chemical EngineeringTohoku UniversitySendaiJapan