Titre du document / Document title

Surface-initiated atom transfer radical polymerization of methyl methacrylate from magnetite nanoparticles at ambient temperature

Auteur(s) / Author(s)

RAGHURAMAN G. K. ⁽¹⁾ ; DHAMODHARAN R. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, INDE

Résumé / Abstract

The synthesis of methyl methacrylate (MMA) brush from the surface of magnetite nanoparticles (core-shell structure), from initiator moieties anchored covalently to the nanoparticles, via room temperature atom transfer radical polymerization (ATRP) is described. The surface-initiated polymerization was carried out from a surface-confined initiator containing a 2-bromoisobutyrate moiety with Cu(I)Br/PMDETA catalytic system. The initiator moiety was covalently anchored to the nanoparticles via a two step modification reaction scheme. Controlled polymerization was observed if ethyl-2-bromoisobutyrate (2-EiBrB) was added as a free/sacrificial initiator. A linear increase of molecular weight and a narrow molecular weight distribution of the PMMA formed in solution, provide evidence for a controlled surface-initiated polymerization, leading to surface-attached polymer brushes under mild conditions. The grafted PMMA provides good stability and dispersibility for the nanoparticles in organic solvents.

Revue / Journal Title

Journal of nanoscience and nanotechnology    ISSN  1533-4880 

Source / Source

2006, vol. 6, n^o7, pp. 2018-2024 [7 page(s) (article)] (29 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Scientific Publishers, Stevenson Ranch, CA, ETATS-UNIS  (2001) (Revue)

Mots-clés anglais / English Keywords

Nanotechnology

;

Mots-clés français / French Keywords

Nanotechnologie

;

Mots-clés d'auteur / Author Keywords

Core-Shell

;

Magnetite

;

Nanoparticles

;

Ambient Temperature

;

ATRP

;

Surface-Initiated Polymerization

;

Localisation / Location

INIST-CNRS, Cote INIST : 27580, 35400015695068.0180