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Monodisperse micron‐size polymer core/nanoparticle pigment shell composite particles via heteroaggregation
Author(s) -
Zubitur Manoli M.,
Sudol E. David,
Dimonie Victoria L.,
ElAasser Mohamed S.
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30463
Subject(s) - dispersity , dispersion polymerization , materials science , polystyrene , polymer , composite number , nanoparticle , chemical engineering , methyl methacrylate , particle size , copolymer , particle (ecology) , polymerization , sonication , polymer chemistry , composite material , nanotechnology , oceanography , geology , engineering
A process for preparing monodisperse, micron‐size composite particles consisting of a polymer core and a nanoparticle pigment shell is described. A heteroaggregation process employing uniform, stable micron‐size polymer particles prepared by dispersion polymerization and unstable carbon black pigment particles proved successful for a variety of polymers including poly(methyl methacrylate) (PMMA), polystyrene (PS), poly( n ‐butyl acrylate) (PBuA), and several functional copolymers. Sonication is applied to the mixture enabling the pigment to be broken into its primary particle size, allowing it to form a relatively uniform layer on the surface of the polymer particles by heteroaggregation when the sonication is removed. Attempts to encapsulate these pigment‐coated particles by seeded polymerization resulted in only partial engulfment of the pigment particles in the surface. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009