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Preparation of Functional Polystyrene Copolymers Through Nitroxide Mediated Polymerization and Their Applications as Surface Modifiers for BaTiO3 Nanoparticles

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Abstract:

Polystyrene copolymers containing maleic anhydride or maleic acid functional groups with controlled architectures were prepared through nitroxide mediated polymerization and applied to BaTiO3 nanoparticles as polymeric surface modifiers. Effective surface modification effect of BaTiO3 nanoparticles with the copolymers were observed, as evidenced by TGA, SEM, EDX and FT-IR. Modified BaTiO3 nanoparticles exhibited improved dispersion in toluene, suggesting that the amphiphilic copolymers acted as dispersants. Through the addition of the surface modifier, the viscosity of the BaTiO3/epoxy pastes decreased and the dielectric constants of the resulting nanocomposite films increased. Molecular weight and number of functional groups of the copolymers were important factors to ascertain good processability and high dielectric constants of the composite.

Keywords: NANOPARTICLES; NITROXIDE MEDIATED POLYMERIZATION; SURFACE MODIFICATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.401

Publication date: March 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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