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Installation of the adamantyl group in polystyrene-block-poly(methyl mathacrylate) via Friedel-Crafts alkylation to modulate the microphase-separated morphology and dimensions
Title: | Installation of the adamantyl group in polystyrene-block-poly(methyl mathacrylate) via Friedel-Crafts alkylation to modulate the microphase-separated morphology and dimensions |
Authors: | Isono, Takuya Browse this author | Baba, Ema Browse this author | Tanaka, Shunma Browse this author | Miyagi, Ken Browse this author | Dazai, Takahiro Browse this author | Li, Feng Browse this author | Yamamoto, Takuya Browse this author →KAKEN DB | Tajima, Kenji Browse this author →KAKEN DB | Satoh, Toshifumi Browse this author →KAKEN DB |
Issue Date: | 14-Jun-2023 |
Publisher: | Royal Society of Chemistry |
Journal Title: | Polymer chemistry |
Volume: | 14 |
Issue: | 22 |
Start Page: | 2675 |
End Page: | 2684 |
Publisher DOI: | 10.1039/d3py00113j |
Abstract: | Although polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) is the most widely employed template and scaffold for constructing nanoscale patterns, its relatively small Flory-Huggins interaction parameter makes it challenging to realize microphase-separated structures with a periodicity (or domain spacing) of less than 20 nm. The direct post-polymerization modification of PS-b-PMMA can resolve this issue. In this study, we present the PS block post-polymerization modification of commercially available PS-b-PMMA through a metal-free Friedel-Crafts alkylation reaction with adamantanols to modulate its microphase-separated morphology and dimensions. The adamantyl group can be easily installed on the PS benzene ring, which increases the incompatibility with the PMMA block, enabling ordered microphase-separated structures, including lamellar, gyroid and hexagonally close-packed cylindrical structures, from low-molecular-weight PS-b-PMMA. Notably, a periodicity as low as approximately 16 nm was realized with this strategy, which is much lower than the lowest accessible periodicity of pristine PS-b-PMMA. Furthermore, we observed additional benefits from the installation of the adamantyl group, such as increased thermal stability, glass transition temperature and etching contrast. |
Type: | article |
URI: | http://hdl.handle.net/2115/89298 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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