Mechanophore activation at heterointerfaces

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

    Research output: Contribution to journalArticlepeer-review

    67 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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