Hybrid Aluminum Colored Pigments Based on Gradient Copolymers Design
✍ Scribed by Mathieu Joubert; Abdel Khoukh; Jean-François Tranchant; Fabrice Morvan; Laurent Billon
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 774 KB
- Volume
- 210
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
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.
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