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Modifying Frank-Kasper Mesophases by Modulating Chain Configuration in PDMS- b-PTFEA Copolymers
- Title
- Modifying Frank-Kasper Mesophases by Modulating Chain Configuration in PDMS- b-PTFEA Copolymers
- Authors
- Jeon S.; Jun T.; Jo S.; Kim K.; Lee B.; Lee S.; Ryu D.Y.
- Ewha Authors
- 김경곤
- SCOPUS Author ID
- 김경곤
- Issue Date
- 2022
- Journal Title
- Macromolecules
- ISSN
- 0024-9297
- Citation
- Macromolecules vol. 55, no. 18, pp. 8049 - 8057
- Publisher
- American Chemical Society
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- The common spherical mesophases observed from chemically distinct compounds have promoted extensive studies of packing structures in soft-matter self-assemblies. Here, we present a new approach for controlling sphere-packing phases by modulating homologous copolymer chain configurations. To this end, three sets of sample pairs, compositionally asymmetric polydimethylsiloxane-b-poly(2,2,2-trifluoroethyl acrylate) (PDMS-b-PTFEA) diblock copolymers (diBCPs) and their homologues containing the corresponding triblock copolymer (triBCP), are synthesized via atom transfer radical polymerization and designed with the consistent volume fractions of the core-forming PTFEA block, fPTFEA= 0.20, 0.18, and 0.15. We identify the formation of C15 and hexagonally close-packed (HCP) phases in the triBCP-containing PDMS-b-PTFEAs, whereas the σ and C14 phases are formed in their diBCP analogues, respectively. These phase shifts into C15 and HCP, due to molecular configuration differences, reveal a significant yet unrealized role of chain configurations and the associated chain size effects in determining the stable sphere-packing phases in BCP systems. © 2022 American Chemical Society. All rights reserved.
- DOI
- 10.1021/acs.macromol.2c01146
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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