Enhancing Mechanochemical Activation in the Bulk State by Designing Polymer Architectures

Hironori Oka, Keiichi Imato, Tomoya Sato, Tomoyuki Ohishi, Raita Goseki, Hideyuki Otsuka*

*この研究の対応する著者

研究成果: Article査読

56 被引用数 (Scopus)

抄録

Mechanoresponsive polymers can have attractive functions; however, the relationship between polymer architecture and mechanoresponsiveness in the bulk state is still poorly understood. Here, we designed well-defined linear and star polymers with a mechanophore at the center of each architecture, and investigated the effect of molecular weight and branched structures on mechanoresponsiveness in the solid state. Diarylbibenzofuranone, which can undergo homolytic cleavage of the central C-C bond by mechanical force to form blue-colored radicals, was used as a mechanophore because the cleaved radicals could be evaluated quantitatively using electron paramagnetic resonance measurements. We confirmed that longer polymer chains induce mechanochemical activation more effectively and found that, in the bulk state, the star polymers have higher sensitivity to mechanical stress compared with a linear polymer having similar molecular weight arm segment.

本文言語English
ページ(範囲)1124-1127
ページ数4
ジャーナルACS Macro Letters
5
10
DOI
出版ステータスPublished - 2016 10 18
外部発表はい

ASJC Scopus subject areas

  • ポリマーおよびプラスチック
  • 有機化学
  • 無機化学
  • 材料化学

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