Effect of Polymer Architecture and Ionic Aggregation on the Scattering Peak in Model Ionomers

被引：91

作者：

Hall, Lisa M. ^{[1
]}

Stevens, Mark J. ^{[1
,2
]}

Frischknecht, Amalie L. ^{[1
,2
]}

机构：

[1] Sandia Natl Labs, Computat Mat Sci & Engn Dept, Albuquerque, NM 87185 USA

[2] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 12期

关键词：

X-RAY-SCATTERING; MOLECULAR-DYNAMICS SIMULATION; MORPHOLOGY; MICROSTRUCTURE; STEM;

D O I：

10.1103/PhysRevLett.106.127801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform molecular dynamics simulations of coarse-grained ionomer melts with two different architectures. Regularly spaced charged beads are placed either in the polymer backbone (ionenes) or pendant to it. The ionic aggregate structure is quantified as a function of the dielectric constant. The low wave vector ionomer scattering peak is present in all cases, but is significantly more intense for pendant ions, which form compact, discrete aggregates with liquidlike interaggregate order. This is in qualitative contrast to the ionenes, which form extended aggregates.

引用

页数：4

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