Poly(styrene-b-ethylene/butylene-b-styrene)/cobalt ferrite magnetic nanocomposites

Guru S. Rajan, Kenneth A. Mauritz, Stacy L. Stromeyer, Tety Kwee, Prakash Mani, James L. Weston, David E. Nikles, Mohammad Shamsuzzoha

Research output: Contribution to journalArticlepeer-review


Magnetic nanoparticles were created in or around the sulfonated (s) poly-styrene domains in a poly[styrene-b-(ethylene-co-butylene)-b-styrene)] block copolymer (BCP) using an in situ inorganic precipitation procedure. The sBCP was neutralized with a mixed iron/cobalt chloride electrolyte, and the doped samples were converted to their oxides by reaction with sodium hydroxide. Transmission electron microscopy indicated the presence of nanoparticles having diameters of 20-50 nm. Metal oxide particle structures were studied using wide angle X-ray diffraction, which revealed that they were inverse spinel cobalt iron oxide crystals. Thermogravimetric analysis provided the weight percent of the inorganic component and nanocomposite thermal decomposition profile. Modulated differential scanning calorimetry studies suggested that the inorganic inclusions were selectively grown in the polystyrene hard block phase. These nanocomposites were shown, using alternating gradient magnetometry, to be ferrimagnetic at room temperature.

Original languageEnglish (US)
Pages (from-to)1475-1485
Number of pages11
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number12
StatePublished - Jun 15 2005


  • Block copolymer templates
  • Cobalt iron oxide
  • Ferrimagnetic
  • In situ precipitation
  • Morphology
  • Nanoparticles

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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