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Fracture and fatigue response of a self-healing epoxy adhesive

被引：128
作者：
Jin, Henghua [1 ]
Miller, Gina M.
Sottos, Nancy R. [1 ]
White, Scott R. [1 ]
机构：
[1] Univ Illinois, Beckman Inst, Urbana, IL 61801 USA
来源：
POLYMER | 2011年 / 52卷 / 07期
基金：
美国国家科学基金会;
关键词：
Self-healing; Adhesives; Epoxy; CRACK DEFLECTION PROCESSES; FIBER-REINFORCED POLYMER; PATH SELECTION; COMPOSITE; RETARDATION; REPAIR;
D O I：
10.1016/j.polymer.2011.02.011
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 [高分子化学与物理];
摘要：
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 mu m) films typical of adhesives applications. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：1628 / 1634
页数：7
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