Polymerization Initiated by Particle Contact: A Quiescent State Trigger for Materials Synthesis

Kristin Hutchins, Nina M. Sekerak, Jeffrey S. Moore

Research output: Contribution to journalArticlepeer-review

Abstract

© 2016 American Chemical Society. Dispersions of particles onto which reactive groups are bound give rise to inhomogeneous concentrations that may afford fundamentally different chemical behavior compared to the same molecular species dissolved in homogeneous solution. An example is bimolecular reactivity of complementary-functionalized particles, whereby interparticle contact is expected to promote fast kinetics localized to the interface, while exhibiting essentially no reactivity elsewhere. Such materials may exhibit unique properties analogous to blood clotting and thereby be useful in self-healing applications. Here, we demonstrate a radical polymerization reaction whose initiation is controlled by the physical proximity of two complementary co-initiators bound to a substrate and/or polymer beads. Polymerization of the surrounding acrylate monomer only occurs when interfaces functionalized with dimethylaniline encounter interfaces bearing benzoyl peroxide. At the interface of the
Original languageEnglish
Pages (from-to)12336-12339
JournalJournal of the American Chemical Society
StatePublished - Sep 28 2016

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