Solvent-Free Atom Transfer Radical Polymerization in the Synthesis of Fe 2 O 3 @Polystyrene Core−Shell Nanoparticles

  • Wang Y
  • Teng X
  • Wang J
 et al. 
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Abstract

This paper describes the use of solvent-free atom transfer radical polymerization (ATRP) in the synthesis of Fe2O3@polystyrene (PS) core?shell nanoparticles. In this approach, oleic acid stabilized Fe2O3 nanoparticles were ligand exchanged with 2-bromo-2-methylpropionic acid (Br-MPA), the initiator for ATRP. These Fe2O3 nanoparticles become soluble in styrene and can be used as macroinitiators for solvent-free ATRP. The synthesized core?shell nanoparticles were characterized by transmission electron microscopy (TEM), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), ultraviolet?visible (UV?vis) spectroscopy, and Fourier transform-infrared (FT-IR) spectroscopy. Well-defined Fe2O3@PS core?shell nanoparticles were obtained. The glassy transition temperature of PS was studied using DSC, and the molecular weight of PS was characterized by GPC. The unique aspects of this solvent-free ATRP in the synthesis of well-defined polymer-coated nanoparticles will be discussed.
This paper describes the use of solvent-free atom transfer radical polymerization (ATRP) in the synthesis of Fe2O3@polystyrene (PS) core?shell nanoparticles. In this approach, oleic acid stabilized Fe2O3 nanoparticles were ligand exchanged with 2-bromo-2-methylpropionic acid (Br-MPA), the initiator for ATRP. These Fe2O3 nanoparticles become soluble in styrene and can be used as macroinitiators for solvent-free ATRP. The synthesized core?shell nanoparticles were characterized by transmission electron microscopy (TEM), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), ultraviolet?visible (UV?vis) spectroscopy, and Fourier transform-infrared (FT-IR) spectroscopy. Well-defined Fe2O3@PS core?shell nanoparticles were obtained. The glassy transition temperature of PS was studied using DSC, and the molecular weight of PS was characterized by GPC. The unique aspects of this solvent-free ATRP in the synthesis of well-defined polymer-coated nanoparticles will be discussed.

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Authors

  • Yong Wang

  • Xiaowei Teng

  • Jin-Shan Wang

  • Hong Yang

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