Hybrid Aluminum Colored Pigments Based on Gradient Copolymers Design

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.magnified image

Organic–inorganic hybrid functional materials by nitroxide-mediated polymerization

“…It is worth mentioning here that similar dye-functionalized copolymer brushes were also immobilized on aluminium flakes by SI-NMP using a related approach, leading to colored pigments [251].…”

Preparation of the Yellow-Colored Aluminum Pigments with Double-Layer Structure Using a Crosslinked Copolymeric Dye

“…A colored polymer/aluminum hybrid pigment was synthesized by copolymerizing with n -butyl acrylate and styrene on the surface of aluminum pigments. They found that both the length of the grafted chains and the dye/styrene molar ratio influenced the color of the resultant hybrid material [28].…”

Formulation and Characterization of New pH Dependent [Alizarin‐poly(4‐vinylpyridine)‐mica] Pigments

“…A great number of hybrid organic/inorganic composites have been developed these last year using many procedures based on polymer chemistry . In fact, a multiple technological and fundamental applications were used depending of the size, the nature and the shape of the inorganic particles . On the other hand, they were based on both the physicochemical polymer adsorption or on the surface initiated polymerization .…”

“…The adsorption or coating of neutral polymers onto mineral supports (silica gel, alumine, …) was largely studied . Comparatively, the modification of mica using polyelectrolyte polymers is relatively new.…”