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

被引：93

作者：

Celestine, Asha-Dee N. ^{[1
,4
]}

Beiermann, Brett A. ^{[2
,4
]}

May, Preston A. ^{[3
,4
]}

Moore, Jeffrey S. ^{[3
,4
]}

Sottos, Nancy R. ^{[2
,4
]}

White, Scott R. ^{[1
,4
]}

机构：

[1] Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[4] Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA

来源：

POLYMER | 2014年 / 55卷 / 16期

基金：

美国国家科学基金会;

关键词：

Mechanophores; Fracture; Poly(methyl methacrylate); POLY(METHYL METHACRYLATE); MECHANICAL ACTIVATION; DEFORMATION; BEHAVIOR; CAVITATION; SENSOR; MECHANOTRANSDUCTION; PATHWAYS; POLYMERS; FILMS;

D O I：

10.1016/j.polymer.2014.06.019

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：

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. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：4164 / 4171

页数：8

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