Journal
ACS MACRO LETTERS
Volume 5, Issue 7, Pages 819-822Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.6b00389
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Funding
- U.S. Office of Naval Research [N0004-13-1-0170]
- NSF [DMR-1206385]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1206385] Funding Source: National Science Foundation
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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.
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