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Densely Arrayed Cage-Shaped Polymer Topologies Synthesized via Cyclopolymerization of Star-Shaped Macromonomers
| Title: | Densely Arrayed Cage-Shaped Polymer Topologies Synthesized via Cyclopolymerization of Star-Shaped Macromonomers |
| Authors: | Mato, Yoshinobu Browse this author | | Sudo, Maho Browse this author | | Marubayashi, Hironori Browse this author | | Ree, Brian J. Browse this author | | Tajima, Kenji Browse this author | | Yamamoto, Takuya Browse this author | | Jinnai, Hiroshi Browse this author | | Isono, Takuya Browse this author | | Satoh, Toshifumi Browse this author →KAKEN DB |
| Keywords: | Cyclopolymerization | | Mass spectrometry | | Mathematical methods | | Cyclization | | Polymers |
| Issue Date: | 12-Oct-2021 |
| Publisher: | American Chemical Society |
| Journal Title: | Macromolecules |
| Volume: | 54 |
| Issue: | 19 |
| Start Page: | 9079 |
| End Page: | 9090 |
| Publisher DOI: | 10.1021/acs.macromol.1c01230 |
| Abstract: | This work reports a facile and versatile ring-opening metathesis polymerization of three- and four-armed star-shaped poly(epsilon-caprolactone) (PCL) macromonomers bearing a norbornenyl group at each chain end using Grubbs' third-generation catalyst under diluted condition to obtain graft polymers (GPs) comprising densely arrayed three- and four-armed cage-shaped grafted PCLs (GPCLs) with narrow dispersity (1.19-1.35) and a controllable number of cage repeating units up to 40 (molecular weight: similar to 320 000 g mol(-1)). The GPCLs were characterized using nuclear magnetic resonance spectroscopy, size exclusion chromatography, and matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry. The cyclopolymerization proceeded via repetitive rapid intramolecular reactions to form cage-shaped units followed by slow intermolecular propagation. This synthesis was applicable to star-shaped poly(L-lactide), poly(trimethylene carbonate), and poly(ethylene glycol). Investigating the structure-property relationships regarding crystallization behavior, hydrodynamic diameter, and viscosity revealed that cage-shaped topological side chains reduced the chain dimensions and mobility compared to their linear and cyclic counterparts. |
| Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/articlesonrequest/AOR-AWSPR2UWDVGWNQUEN7SU. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/86801 |
| 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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Submitter: 間藤 芳允
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