Publication
592
Langmuir 21 (10), 4686 -4694, 2005
DOI: 10.1021/la046912m S0743-7463(04)06912-4
|
|
|
Novel Approach for Metallic Surface-Initiated Atom Transfer Radical Polymerization Using Electrografted Initiators Based on Aryl Diazonium Salts |
|
|
|
Tarik Matrab, Mohamed M. Chehimi, Christian Perruchot, Alain Adenier, Alexandrine Guillez, Maud Save, Bernadette Charleux, Eva Cabet-Deliry,
and Jean Pinson
ITODYS, UMR 7086 CNRS-Université Paris 7, 1 rue Guy de la Brosse, 75005
Paris, France, Laboratoire de Chimie Macromoléculaire, UMR 7610 CNRS-Université
Paris 6, 4 Place Jussieu, 75252, Paris Cedex 05, France, and Laboratoire
d'Electrochimie Moléculaire, UMR 75951 CNRS-Université Paris 7, 2 Place Jussieu,
75251, Paris Cedex 05, France
This paper reports on the preparation of poly(methyl methacrylate) (PMMA),
poly(n-butyl acrylate) (PBA), and polystyrene (PS) brushes at the surface
of conducting materials that were modified by the electrochemical reduction of a
brominated aryl diazonium salt BF4-,
+N2-C6H4-CH(CH3)-Br
. The grafted organic species
-C6H4-CH(CH3)-Br was found to be very effective
in initiating atom transfer radical polymerization (ATRP) of vinyl monomers.
This novel approach combining diazonium salts and ATRP allowed PMMA, PBA, and PS
brushes to be grown from the surface of iron electrodes. The polymer films were
characterized in terms of their chemical structure by infrared reflection
absorption spectroscopy and X-ray photoelectron spectroscopy. Atomic force
microscopy studies indicated that the polymer brushes are densely packed.
Contact angle measurements of water drops on PS and PMMA brushes were 88.1 ± 2.0
and 70.3 ± 2.1, respectively, which is consistent with the published wettability data for the
corresponding polymer sheets.. |
