Complex Self-Assembled Morphologies of Thin Films of an Asymmetric A(3)B(3)C(3) Star Polymer
SCIE
SCOPUS
- Title
- Complex Self-Assembled Morphologies of Thin Films of an Asymmetric A(3)B(3)C(3) Star Polymer
- Authors
- Yecheol Rho; Changsub Kim; Tomoya Higashihara; Sangwoo Jin; Jungwoon Jung; Tae Joo Shin; Akira Hirao; Ree, M
- Date Issued
- 2013-10
- Publisher
- ACS
- Abstract
- An asymmetric nine-arm star polymer, (polystyrene)(3)-(poly(4-methoxystyrene))(3)-(polyisoprene)(3) (PS3-PMOS3-PI3) was synthesized, and the details of the structures of its thin films were successfully investigated for the first time by using in situ grazing incidence X-ray scattering (GIXS) with a synchrotron radiation source. Our quantitative GIXS analysis showed that thin films of the star polymer molecules have very complex but highly ordered and preferentially in-plane oriented hexagonal (HEX) structures consisting of truncated PS cylinders and PMOS triangular prisms in a PI matrix. This HEX structure undergoes a partial rotational transformation process at temperatures above 190 degrees C that produces a 30 degrees-rotated HEX structure; this structural isomer forms with a volume fraction of 23% during heating up to 220 degrees C and persists during subsequent cooling. These interesting and complex self-assembled nanostructures are discussed in terms of phase separation, arm number, volume ratio, and confinement effects.
- Keywords
- X-RAY-SCATTERING; LIVING ANIONIC-POLYMERIZATION; ORGANOSILICATE DIELECTRIC FILMS; HEXAGONALLY PERFORATED LAYER; POLYSTYRENE-B-POLYISOPRENE; BLOCK-COPOLYMERS; DIBLOCK COPOLYMER; SUCCESSIVE SYNTHESIS; SHAPED TERPOLYMERS; BRANCHED POLYMERS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15164
- DOI
- 10.1021/MZ400363K
- ISSN
- 2161-1653
- Article Type
- Article
- Citation
- ACS Macro Letters, vol. 2, no. 10, page. 849 - 855, 2013-10
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- There are no files associated with this item.
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