Hierarchical Self-Assembled Structures from POSS-Containing Block Copolymers Synthesized by Living Anionic Polymerization
SCIE
SCOPUS
- Title
- Hierarchical Self-Assembled Structures from POSS-Containing Block Copolymers Synthesized by Living Anionic Polymerization
- Authors
- Hirai, T; Leolukman, M; Jin, S; Goseki, R; Ishida, Y; Kakimoto, MA; Hayakawa, T; Ree, M; Gopalan, P
- Date Issued
- 2009-11-24
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Two kinds of polyhedral oligomeric silsesquioxane (POSS)-containing block copolymers (BCPs), namely PS-b-PMAPOSS and PMMA-b-PMAPOSS, were synthesized by living anionic polymerization. A wide range of molecular weights were obtained with a very narrow polydispersity index of less than 1.09. The bulk samples prepared by slow evaporation from a polymer solution in chloroform exhibit well-defined microphase-separated structures with long-range order. Thermal annealing induced hierarchical structures consisting of a smaller length scale ordered crystalline POSS domains within the larger microphase-separated structures. We report detailed structural characterization of these hierarchical structures in bulk and thin films by transmission electron microscopy and grazing incidence wide-angle X-ray scattering (GIWAXS). On the basis of this structural analysis, we propose a model for the formation of an orthorhombic lattice structure through the aggregation of POSS segments which formed a helix-like structure.
- Keywords
- X-RAY-SCATTERING; THIN-FILMS; LITHOGRAPHY; NANOSTRUCTURES; POLYSTYRENE; ORIENTATION; TEMPLATES; ARRAYS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27567
- DOI
- 10.1021/MA9018944
- ISSN
- 0024-9297
- Article Type
- Article
- Citation
- MACROMOLECULES, vol. 42, no. 22, page. 8835 - 8843, 2009-11-24
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- There are no files associated with this item.
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