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Synthesis of poly(N,N-dimethylacrylamide) brushes from functionalized latex surfaces by aqueous atom transfer radical polymerization

TitleSynthesis of poly(N,N-dimethylacrylamide) brushes from functionalized latex surfaces by aqueous atom transfer radical polymerization
Publication TypeBook Chapter
Year of Publication2003
AuthorsKizhakkedathu, JN, Goodman, D, Brooks, DE
EditorMatyjaszewski, K
Book TitleAdvances in Controlled/Living Radical Polymerization
Series TitleAcs Symposium Series
Volume854
Pagination316-330
PublisherAmer Chemical Soc
CityWashington
ISBN Number0097-61560-8412-3854-5
KeywordsADSORPTION, BLOCK-COPOLYMERS, density, FORCE MICROSCOPE, INITIATED POLYMERIZATIONS, LAYER, MEDIA, POLYMERS, SELF-ASSEMBLED MONOLAYERS
Abstract

Negatively charged, ATRP initiator functionalized polystyrene latexes were synthesized and N,N-dimethylacrylamide was polymerized from their surfaces by aqueous ATRP using several catalyst combinations. Very high grafting densities and molecular weights were achieved with good polydispersities. The brushes exhibited a strong repulsive force that increased with molecular weight in atomic force microscopy measurements. Hydrodynamic thicknesses were consistent with theory. Polymerization from these surfaces is very different from ATRP in solution and depends on monomer concentration in solution, type of catalyst, and surface initiator concentration. The observations were explained with an electrostatic model of the surface region that predicts an increase in the local concentration of Cu(I) and Cu(II) catalyst complexes.

URL<Go to ISI>://000183406500022