Mechanical heterogeneities in model polymer glasses at small length scales

被引：215

作者：

Yoshimoto, K ^{[1
]}

Jain, TS

Workum, KV

Nealey, PF

de Pablo, JJ

机构：

[1] Univ Wisconsin, Dept Biol & Chem Engn, Madison, WI 53706 USA

[2] Natl Inst Stand & Technol, Div Polymers, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 17期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.175501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular simulations of a model, deeply quenched polymeric glass show that the elastic moduli become strongly inhomogeneous at length scales comprising several tens of monomers; these calculations reveal a broad distribution of local moduli, with regions of negative moduli coexisting within a matrix of positive moduli. It is shown that local moduli have the same physical meaning as that traditionally ascribed to moduli obtained from direct measurements of local constitutive behaviors of macroscopic samples.

引用

页码：175501 / 1

页数：4

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