Mechanophore activation at heterointerfaces

Jun Li, Tomohiro Shiraki, Bin Hu, Roger A.E. Wright, Bin Zhao, Jeffrey S. Moore

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Silica nanoparticles grafted with poly(methyl acrylate) (PMA) chains anchored by a maleimide-anthracene cycloadduct were synthesized to demonstrate mechanochemically selective activation of mechanophores at heterogeneous interfaces. By quantifying the anthracene-containing cleaved PMA polymers, which are generated via retro-[4 + 2] cycloaddition reactions, the first-order kinetic coefficient was determined. Activation characteristics of mechanophores anchored to a nanoparticle exhibit behavior similar to mechanophore-linked polymers, e.g., threshold molecular weight and linear increase in rate coefficient with molecular weight above the threshold. This model system is thus valuable as a probe to test stress activation of interfacially bonded mechanophores relevant to the design of fiber-reinforced polymer composites.

Original languageEnglish
Pages (from-to)15925-15928
Number of pages4
JournalJournal of the American Chemical Society
Volume136
Issue number45
DOIs
Publication statusPublished - Nov 12 2014

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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    Li, J., Shiraki, T., Hu, B., Wright, R. A. E., Zhao, B., & Moore, J. S. (2014). Mechanophore activation at heterointerfaces. Journal of the American Chemical Society, 136(45), 15925-15928. https://doi.org/10.1021/ja509949d