Fracture and fatigue response of a self-healing epoxy adhesive

Henghua Jin; Gina M. Miller; Nancy R. Sottos; Scott R. White

doi:10.1016/j.polymer.2011.02.011

Fracture and fatigue response of a self-healing epoxy adhesive

Henghua Jin, Gina M. Miller, Nancy R. Sottos, Scott R. White

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

Abstract

A self-healing epoxy adhesive for bonding steel substrates is demonstrated using encapsulated dicyclopentadiene (DCPD) monomer and bis(tricyclohexylphosphine)benzylidine ruthenium (IV) dichloride (Grubbs' first generation) catalyst particles dispersed in a thin epoxy matrix. Both quasi-static fracture and fatigue performance are evaluated using the width-tapered-double-cantilever-beam specimen geometry. Recovery of 56% of the original fracture toughness under quasi-static fracture conditions occurs after 24 h healing at room temperature conditions. Complete crack arrest is demonstrated for fatigue test conditions that render neat resin and control samples failed. Inspection of fracture surfaces by electron microscopy reveals evidence of polymerized DCPD after healing. These results are the first mechanical assessment of self-healing for thin (ca. 360 μm) films typical of adhesives applications.

Original language	English (US)
Pages (from-to)	1628-1634
Number of pages	7
Journal	Polymer
Volume	52
Issue number	7
DOIs	https://doi.org/10.1016/j.polymer.2011.02.011
State	Published - Mar 23 2011

Keywords

Adhesives
Epoxy
Self-healing

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics

Online availability

10.1016/j.polymer.2011.02.011

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title = "Fracture and fatigue response of a self-healing epoxy adhesive",

abstract = "A self-healing epoxy adhesive for bonding steel substrates is demonstrated using encapsulated dicyclopentadiene (DCPD) monomer and bis(tricyclohexylphosphine)benzylidine ruthenium (IV) dichloride (Grubbs' first generation) catalyst particles dispersed in a thin epoxy matrix. Both quasi-static fracture and fatigue performance are evaluated using the width-tapered-double-cantilever-beam specimen geometry. Recovery of 56% of the original fracture toughness under quasi-static fracture conditions occurs after 24 h healing at room temperature conditions. Complete crack arrest is demonstrated for fatigue test conditions that render neat resin and control samples failed. Inspection of fracture surfaces by electron microscopy reveals evidence of polymerized DCPD after healing. These results are the first mechanical assessment of self-healing for thin (ca. 360 μm) films typical of adhesives applications.",

keywords = "Adhesives, Epoxy, Self-healing",

author = "Henghua Jin and Miller, {Gina M.} and Sottos, {Nancy R.} and White, {Scott R.}",

note = "Funding Information: The authors gratefully acknowledge funding support from National Science Foundation (Grant # CMS 05-27965 ) and Sandia National Laboratories ( SPO 378467 ) with Dr. Dennis Roach as Program Manager. The authors would also like to thank Kent Elam in the Aerospace Engineering Machine Shop for help manufacturing the WTDCB adherends. Testing was completed at the Advanced Materials Testing and Engineering Lab, with assistance of Peter Kurath, Gavin Horn and Rick Rottet. Electron microscopy was performed in the Imaging Technology Group, Beckman Institute for Advanced Science and Technology at the University of Illinois, with the assistance of Scott Robinson. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",

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AU - Jin, Henghua

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AU - Sottos, Nancy R.

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N1 - Funding Information: The authors gratefully acknowledge funding support from National Science Foundation (Grant # CMS 05-27965 ) and Sandia National Laboratories ( SPO 378467 ) with Dr. Dennis Roach as Program Manager. The authors would also like to thank Kent Elam in the Aerospace Engineering Machine Shop for help manufacturing the WTDCB adherends. Testing was completed at the Advanced Materials Testing and Engineering Lab, with assistance of Peter Kurath, Gavin Horn and Rick Rottet. Electron microscopy was performed in the Imaging Technology Group, Beckman Institute for Advanced Science and Technology at the University of Illinois, with the assistance of Scott Robinson. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2011/3/23

Y1 - 2011/3/23

N2 - A self-healing epoxy adhesive for bonding steel substrates is demonstrated using encapsulated dicyclopentadiene (DCPD) monomer and bis(tricyclohexylphosphine)benzylidine ruthenium (IV) dichloride (Grubbs' first generation) catalyst particles dispersed in a thin epoxy matrix. Both quasi-static fracture and fatigue performance are evaluated using the width-tapered-double-cantilever-beam specimen geometry. Recovery of 56% of the original fracture toughness under quasi-static fracture conditions occurs after 24 h healing at room temperature conditions. Complete crack arrest is demonstrated for fatigue test conditions that render neat resin and control samples failed. Inspection of fracture surfaces by electron microscopy reveals evidence of polymerized DCPD after healing. These results are the first mechanical assessment of self-healing for thin (ca. 360 μm) films typical of adhesives applications.

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Fracture and fatigue response of a self-healing epoxy adhesive

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