Journal article
Synthesis of comb block copolymers by ROMP, ATRP, and ROP and their assembly in the solid state
Macromolecules, Vol.39(2), pp.498-508
2006
DOI: 10.1021/ma052012g
Abstract
This article reports the synthesis of comb block copolymers with backbones from exo-norbornene esters via ring-opening metathesis polymerizations (ROMP) and arms composed of polystyrene and polylactide. These polymers represent an exciting new architecture of polymers that have applications in the fabrication of photonic materials and nanofluidic systems. The living polymerization of block copolymers by ROMP with degrees of polymerization up to 2000 units and polydispersities less than 1.2 are described. This result is important as it extends the range of block copolymers that can be synthesized by ROMP to include those with high molecular weights. Comb block copolymers were grown from these block copolymers as they displayed initiators for the ring-opening polymerization of lactide and the atom transfer radical polymerization of styrene. Comb block copolymers with polystyrene and polylactide arms were synthesized with molecular weights up to 63 000 000 g mol -1. The polystyrene arms had narrow polydispersities and molecular weights in excess of 10000 g mol -1; this result showed that the polymerization of styrene was well controlled. The sizes and shapes of these comb polymers were characterized by multiangle laser light scattering and scanning probe microscopy and demonstrated that some of these polymers were shaped as rigid rods with lengths in excess of 300 nm. To demonstrate their potential as photonic materials, an example of a comb block copolymer was assembled in the solid state with domain sizes exceeding 100 nm and characterized by scanning electron microscopy. © 2006 American Chemical Society.
Details
- Title: Subtitle
- Synthesis of comb block copolymers by ROMP, ATRP, and ROP and their assembly in the solid state
- Creators
- M. Brett Runge - Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United StatesSamrat Dutta - Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United StatesNed B Bowden - Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
- Resource Type
- Journal article
- Publication Details
- Macromolecules, Vol.39(2), pp.498-508
- Publisher
- American Chemical Society
- DOI
- 10.1021/ma052012g
- ISSN
- 0024-9297
- eISSN
- 1520-5835
- Language
- English
- Date published
- 2006
- Academic Unit
- Chemistry
- Record Identifier
- 9984216566902771
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