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Initiator‐Grafted Silica Particles for Controlled Free Radical Polymerization: Influence of the Initiator Structure on the Grafting Density
Author(s) -
Parvole Julien,
Laruelle Gaël,
Guimon Claude,
Francois Jeanne,
Billon Laurent
Publication year - 2003
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200300035
Subject(s) - nitroxide mediated radical polymerization , atom transfer radical polymerization , polymer chemistry , radical polymerization , polymerization , thermogravimetric analysis , chemistry , grafting , reversible addition−fragmentation chain transfer polymerization , photochemistry , materials science , organic chemistry , polymer
A series of organic‐inorganic hybrid particles were synthesized by a self‐assembled layer of different initiators, immobilized on silica particles and used for controlled radical polymerization. We use three different initiator systems for atom‐transfer radical polymerization (ATRP), unimolecular nitroxide mediated polymerization (NMP), and bimolecular NMP, for the development of the hybrid inorganic/organic particles. After preliminary qualitative characterization by X‐ray spectroscopy (XPS) and Fourier‐transformed infrared (FT‐IR) measurements, the hybrid nanoparticles were studied by thermogravimetric analysis (TGA) to determine and discuss the initiator graft density in terms of steric hindrance.The coupling agents employed for the various approaches used here: a) NMP1‐bimolecular system, b) NMP2‐unimolecular system, and c) ATRP.