Header menu link for other important links
X
Synthesis of polymer grafted magnetite nanoparticle with the highest grafting density via controlled radical polymerization
Kothandapani Ganesh Sanjeevi Babu,
Published in
2009
Volume: 4
   
Issue: 9
Pages: 1090 - 1102
Abstract
The surface-initiated ATRP of benzyl methacrylate, methyl methacrylate, and styrene from magnetite nanoparticle is investigated, without the use of sacrificial (free) initiator in solution. It is observed that the grafting density obtained is related to the polymerization kinetics, being higher for faster polymerizing monomer. The grafting density was found to be nearly 2 chains/nm 2 for the rapidly polymerizing benzyl methacrylate. In contrast, for the less rapidly polymerizing styrene, the grafting density was found to be nearly 0.7 chain/nm 2. It is hypothesized that this could be due to the relative rates of surface-initiated polymerization versus conformational mobility of polymer chains anchored by one end to the surface. An amphiphilic diblock polymer based on 2-hydroxylethyl methacrylate is synthesized from the polystyrene monolayer. The homopolymer and block copolymer grafted MNs form stable dispersions in various solvents. In order to evaluate molecular weight of the polymer that was grafted on to the surface of the nanoparticles, it was degrafted suitably and subjected to gel permeation chromatography analysis. Thermogravimetric analysis, transmission electron microscopy, and Fourier transform infrared spectroscopy were used to confirm the grafting reaction. © to the authors 2009.
About the journal
JournalNanoscale Research Letters
ISSN19317573
Open AccessYes
Concepts (42)
  •  related image
    AMPHIPHILICS
  •  related image
    Conformational mobility
  •  related image
    CONTROLLED RADICAL POLYMERIZATION
  •  related image
    DIBLOCK POLYMERS
  •  related image
    Grafting densities
  •  related image
    GRAFTING REACTIONS
  •  related image
    Homopolymers
  •  related image
    Magnetite nanoparticle
  •  related image
    Magnetite nanoparticles
  •  related image
    Methyl methacrylates
  •  related image
    POLY(BENZYL METHACRYLATE)
  •  related image
    Polymer chains
  •  related image
    POLYMER-GRAFTED
  •  related image
    POLYMERIZATION KINETICS
  •  related image
    RELATIVE RATES
  •  related image
    Stable dispersions
  •  related image
    SURFACE INITIATED POLYMERIZATION
  •  related image
    SURFACE-INITIATED ATRP
  •  related image
    Acrylic monomers
  •  related image
    Anodic oxidation
  •  related image
    Atoms
  •  related image
    Block copolymers
  •  related image
    Chromatographic analysis
  •  related image
    Esters
  •  related image
    Fourier transform infrared spectroscopy
  •  related image
    Free radical reactions
  •  related image
    Grafting (chemical)
  •  related image
    Magnetite
  •  related image
    Monolayers
  •  related image
    Nanoparticles
  •  related image
    Oxide minerals
  •  related image
    Polymerization
  •  related image
    Polymers
  •  related image
    Polystyrenes
  •  related image
    Self assembly
  •  related image
    Spectroscopic analysis
  •  related image
    Spectroscopy
  •  related image
    Styrene
  •  related image
    Synthesis (chemical)
  •  related image
    Thermogravimetric analysis
  •  related image
    Transmission electron microscopy
  •  related image
    ATOM TRANSFER RADICAL POLYMERIZATION