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Hybrid Aluminum Colored Pigments Based on Gradient Copolymers Design
Author(s) -
Joubert Mathieu,
Khoukh Abdel,
Tranchant JeanFrançois,
Morvan Fabrice,
Billon Laurent
Publication year - 2009
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900254
Subject(s) - polymerization , monomer , copolymer , polymer chemistry , materials science , styrene , polymer , acrylate , aluminium , chemical engineering , composite material , engineering
A colored polymer/aluminium hybrid pigment was synthesized by nitroxide mediated polymerization initiated from an inorganic surface. This approach requires the preparation of a vinyl dye monomer able to copolymerize with n ‐butyl acrylate (n‐BuA) and styrene (S) from the surface of aluminium flakes. The linearity of the ln([M] 0 /[M] t ) and of the $\overline M _{\rm n}$ as a function of time and conversion constitute the criteria of control/“living” polymerization, i.e. linearity of respectively ln([M] 0 /[M] t ) = f (t) and the $\overline M _{\rm n}$ = f (conversion) plots. Kinetic measurements reveal an upward deviation from the linearity for n ‐BuA polymerization for very high conversion. The introduction of S monomer restores the control of the polymerization. Both the length of the grafted chains and the dye/styrene molar ratio influence the color of the hybrid material.