Effect of Polymer Grafting Density on Mechanophore Activation at Heterointerfaces

Jun Li, Bin Hu, Ke Yang, Bin Zhao, Jeffrey S. Moore

Research output: Contribution to journalArticle

Abstract

Silica nanoparticles grafted with poly(methyl acrylate) chains whose anchor points are maleimide-anthracene cycloadducts were prepared at various grafting densities to demonstrate fundamental characteristics of mechanophore activation at heterointerfaces. The monotonically decreasing correlation between polymer grafting density and surface-bound maleimide-anthracene mechanophore activation was quantitatively elucidated and discussed. Presumably as a result of polymer-polymer interactions, polymer grafting density plays a significant role in heterogeneous mechanophore activation. The findings are a valuable guide in the design of efficient force-sensitive, damage-reporting polymer composites, where damage is often localized to the interface between the matrix and the reinforcing phase.

Original languageEnglish (US)
Pages (from-to)819-822
Number of pages4
JournalACS Macro Letters
Volume5
Issue number7
DOIs
StatePublished - Jul 19 2016

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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