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Downsizing feature of microphase-separated structures via intramolecular crosslinking of block copolymers

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Title: Downsizing feature of microphase-separated structures via intramolecular crosslinking of block copolymers
Authors: Watanabe, Kodai Browse this author
Katsuhara, Satoshi Browse this author
Mamiya, Hiroaki Browse this author
Yamamoto, Takuya Browse this author
Tajima, Kenji Browse this author
Isono, Takuya Browse this author
Satoh, Toshifumi Browse this author →KAKEN DB
Keywords: chain polymeric nanoparticles
amphiphilic random copolymers
NM features
perpendicular orientation
Issue Date: 21-Mar-2019
Publisher: Royal Society of Chemistry
Journal Title: Chemical science
Volume: 10
Issue: 11
Start Page: 3330
End Page: 3339
Publisher DOI: 10.1039/c8sc05016c
Abstract: A novel strategy for downsizing the feature of microphase-separated structures was developed via the intramolecular crosslinking reaction of block copolymers (BCPs) without changing the molecular weight. A series of BCPs consisting of poly[styrene-st-(p-3-butenyl styrene)] and poly(rac-lactide) (SBS-LA) was subjected to Ru-catalyzed olefin metathesis under highly diluted conditions to produce intramolecularly crosslinked BCPs (SBS(cl)-LAs). Small-angle X-ray scattering measurement and transmission electron microscopy observation of the SBS(cl)-LAs revealed feature size reduction in lamellar (LAM) and hexagonally close-packed cylinder (HEX) structures in the bulk state, which was surely due to the restricted chain dimensions of the intramolecularly crosslinked SBS block. Notably, the degree of size reduction was controllable by varying the crosslink density, with a maximum decrease of 22% in the LAM spacing. In addition, we successfully observed the downsizing of the HEX structure in the thin film state using atomic force microscopy, indicating the applicability of the present methodology to nextgeneration lithography technology.
Type: article
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)

Submitter: 磯野 拓也

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