Fracture-induced activation in mechanophore-linked, rubber toughened PMMA

Asha Dee N. Celestine; Brett A. Beiermann; Preston A. May; Jeffrey S. Moore; Nancy R. Sottos; Scott R. White

doi:10.1016/j.polymer.2014.06.019

Fracture-induced activation in mechanophore-linked, rubber toughened PMMA

Asha Dee N. Celestine, Brett A. Beiermann, Preston A. May, Jeffrey S. Moore, Nancy R. Sottos, Scott R. White

Research output: Contribution to journal › Article › peer-review

Abstract

Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indicating the mechanochemical transformation of the spiropyran molecules. The degree of mechanophore activation is quantified via fluorescence imaging and is observed to increase with increasing crack length. The region of mechanophore activation correlates directly with the size of the plastic zone ahead of the crack tip.

Original language	English (US)
Pages (from-to)	4164-4171
Number of pages	8
Journal	Polymer
Volume	55
Issue number	16
DOIs	https://doi.org/10.1016/j.polymer.2014.06.019
State	Published - Aug 5 2014

Keywords

Fracture
Mechanophores
Poly(methyl methacrylate)

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

Online availability

10.1016/j.polymer.2014.06.019

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title = "Fracture-induced activation in mechanophore-linked, rubber toughened PMMA",

abstract = "Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indicating the mechanochemical transformation of the spiropyran molecules. The degree of mechanophore activation is quantified via fluorescence imaging and is observed to increase with increasing crack length. The region of mechanophore activation correlates directly with the size of the plastic zone ahead of the crack tip.",

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AU - Celestine, Asha Dee N.

AU - Beiermann, Brett A.

AU - May, Preston A.

AU - Moore, Jeffrey S.

AU - Sottos, Nancy R.

AU - White, Scott R.

PY - 2014/8/5

Y1 - 2014/8/5

N2 - Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indicating the mechanochemical transformation of the spiropyran molecules. The degree of mechanophore activation is quantified via fluorescence imaging and is observed to increase with increasing crack length. The region of mechanophore activation correlates directly with the size of the plastic zone ahead of the crack tip.

AB - Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indicating the mechanochemical transformation of the spiropyran molecules. The degree of mechanophore activation is quantified via fluorescence imaging and is observed to increase with increasing crack length. The region of mechanophore activation correlates directly with the size of the plastic zone ahead of the crack tip.

KW - Fracture

KW - Mechanophores

KW - Poly(methyl methacrylate)

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Fracture-induced activation in mechanophore-linked, rubber toughened PMMA

Abstract

Keywords

ASJC Scopus subject areas

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