Facile Surface Immobilization of ATRP Initiators on Colloidal Polymers for Grafting Brushes and Application to Colloidal Crystals

Bromo-initiators for atom transfer radical polymerization (ATRP) were successfully immobilized on the surfaces of cross-linked poly(methyl methacrylate) (PMMA) spheres by soap-free emulsion polymerization using CBr4 as the chain transfer agent. Subsequent surface-initiated ATRP (SI-ATRP) afforded a...

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Bibliographic Details
Published in:Langmuir 2011-02, Vol.27 (3), p.1168-1174
Main Authors: Liu, Yi-Yu, Chen, Hui, Ishizu, Koji
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Colloids - chemistry
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Microscopy, Electron, Scanning
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Polymers - chemistry
Polymethyl Methacrylate - chemistry
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Summary:Bromo-initiators for atom transfer radical polymerization (ATRP) were successfully immobilized on the surfaces of cross-linked poly(methyl methacrylate) (PMMA) spheres by soap-free emulsion polymerization using CBr4 as the chain transfer agent. Subsequent surface-initiated ATRP (SI-ATRP) afforded a layer of PMMA brushes covalently attached to the sphere surfaces. Colloidal crystal films of these monodisperse spheres were then studied to identify the relationship between variation in particle diameter and the optical properties. The particle diameters were controlled by varying the feed monomer proportions in soap-free emulsion polymerization and the thickness of the grafted brush layer. It was found that the particle diameter could successfully be controlled to obtain crystal films that produce a variety of brilliant colors in the visible region. The results of this study can provide useful information for facile preparation of surface-immobilized ATRP initiators on colloidal polymers and can be employed for grafting polymer brushes.
ISSN:0743-7463
1520-5827
DOI:10.1021/la103560j