Reversible ring-crossover polymerization of macrocycles based on radical exchange reaction

Hideyuki Otsuka, Go Yamaguchi, Yuji Higaki, Atsushi Takahara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Recently, the authors have reported the synthesis of "dynamic covalent polymers" which have alkoxyamine-based dynamic covalent bonds in their main chains. In this study, the authors report the reversible "ring-crossover" polymerization behavior of macrocycles containing alkoxyamine units which can show radical crossover reaction upon heating. Simple heating of the [2+2] macrocycle in anisole at 398 K afforded the corresponding poly(alkoxyamine) with Mn=2000-18000 due to the intermolecular radical crossover reaction. A [1+1] macrocycle was also synthesized by using diacid chloride with longer spacer. The oligomers obtained by radical ring-crossover polymerization were depolymerized to the monomers mainly by the intramolecular radical exchange process under high-dilution conditions.

Original languageEnglish
Title of host publication54th SPSJ Symposium on Macromolecules - Polymer Preprints, Japan
Pages2770-2771
Number of pages2
Volume54
Edition2
Publication statusPublished - 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: Sep 20 2005Sep 22 2005

Other

Other54th SPSJ Symposium on Macromolecules
CountryJapan
CityYamagata
Period9/20/059/22/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Otsuka, H., Yamaguchi, G., Higaki, Y., & Takahara, A. (2005). Reversible ring-crossover polymerization of macrocycles based on radical exchange reaction. In 54th SPSJ Symposium on Macromolecules - Polymer Preprints, Japan (2 ed., Vol. 54, pp. 2770-2771)