Changing the structural and physical properties of 3-arm star poly(δ-valerolactone)s by a branch-point design

Hibiki Ogiwara; Fumitaka Ishiwari; Tadahiro Kimura; Yukihiro Yamashita; Takashi Kajitani; Atsuki Sugimoto; Masatoshi Tokita; Masaki Takata; Takanori Fukushima

doi:10.1039/D1CC01092A

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Changing the structural and physical properties of 3-arm star poly(δ-valerolactone)s by a branch-point design†

Hibiki Ogiwara,^a Fumitaka Ishiwari,

‡*^ab Tadahiro Kimura,^a Yukihiro Yamashita,^a Takashi Kajitani,^bc Atsuki Sugimoto,^d Masatoshi Tokita,

^d Masaki Takata^be and Takanori Fukushima

*^a

Author affiliations

* Corresponding authors

^a Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8503, Japan
E-mail: fukushima@res.titech.ac.jp

^b RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan

^c Materials Analysis Division, Open Facility Center, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

^d Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, Japan

^e International Center for Synchrotron Radiation Innovation Smart, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Abstract

The chemical structure of a branch point of star-shaped polymers has been considered to have a small influence on the physical properties of the entire polymer. Contrary to this general notion, here we show that a 3-arm star polymer, composed of three poly(δ-valerolactone) arms extended from one side of a triptycene branch point, exhibits a remarkably high complex viscosity, compared to the analogous star-shaped polymers with a branch point of a triptycene isomer or triphenylethane.

This article is part of the themed collection: 2021 Emerging Investigators

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DOI: https://doi.org/10.1039/D1CC01092A
Article type: Communication
Submitted: 27 Feb 2021
Accepted: 16 Mar 2021
First published: 16 Mar 2021

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Chem. Commun., 2021,57, 3901-3904

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Changing the structural and physical properties of 3-arm star poly(δ-valerolactone)s by a branch-point design

H. Ogiwara, F. Ishiwari, T. Kimura, Y. Yamashita, T. Kajitani, A. Sugimoto, M. Tokita, M. Takata and T. Fukushima, Chem. Commun., 2021, 57, 3901 DOI: 10.1039/D1CC01092A

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Chemical Communications

Changing the structural and physical properties of 3-arm star poly(δ-valerolactone)s by a branch-point design†

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Changing the structural and physical properties of 3-arm star poly(δ-valerolactone)s by a branch-point design

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