Journal article
Synthesis of High Molecular Weight Comb Block Copolymers and Their Assembly into Ordered Morphologies in the Solid State
Journal of the American Chemical Society, Vol.129(34), pp.10551-10560
08/29/2007
DOI: 10.1021/ja072929q
PMID: 17685524
Abstract
This Article describes a simple two-step synthesis of comb block copolymers with molecular weights exceeding 1 000 000 g mol-1 and their assembly into ordered morphologies in the solid state. This work is exciting because these polymers assembled into morphologies with domain sizes exceeding 100 nm and, in some examples, 200 nm without the use of additives. These materials reflected selected wavelengths of visible light, and these wavelengths could be affected by swelling with methylene chloride vapor. A comparison between the structures of comb block copolymers and linear block copolymers is presented with a discussion of important parameters affecting their assembly in the solid state. This Article will first describe the synthesis of comb block copolymers using ring opening metathesis polymerization and atom transfer radical polymerization and their subsequent characterization. The comb block copolymers, backbone polymers, and polystyrene arms were all characterized independent of each other and had low polydispersities. The comb block copolymers were assembled by dissolving in methylene chloride and allowing the solvent to evaporate. After thermal annealing, the polymers were characterized by scanning electron and optical microscopy. These polymers assembled into spherical, lamellar, and cylindrical arrays with domain sizes from 132 to 258 nm. This work extends the molecular architectures of polymers that can be assembled in the solid state, the molecular weights of block copolymers that were assembled, and the domain sizes that can be realized without the use of additives. © 2007 American Chemical Society.
Details
- Title: Subtitle
- Synthesis of High Molecular Weight Comb Block Copolymers and Their Assembly into Ordered Morphologies in the Solid State
- Creators
- M. Brett Runge - Contribution from the Department of Chemistry, 423K Chemistry Building, University of Iowa,Iowa City, Iowa 52242Ned B Bowden - Contribution from the Department of Chemistry, 423K Chemistry Building, University of Iowa,Iowa City, Iowa 52242
- Resource Type
- Journal article
- Publication Details
- Journal of the American Chemical Society, Vol.129(34), pp.10551-10560
- Publisher
- American Chemical Society
- DOI
- 10.1021/ja072929q
- PMID
- 17685524
- ISSN
- 0002-7863
- eISSN
- 1520-5126
- Language
- English
- Date published
- 08/29/2007
- Academic Unit
- Chemistry
- Record Identifier
- 9984216606002771
Metrics
13 Record Views