Testing the minimum thermal conductivity model for amorphous polymers using high pressure

被引：92

作者：

Hsieh, Wen-Pin ^{[1
,2
]}

Losego, Mark D. ^{[3
]}

Braun, Paul V. ^{[2
,3
]}

Shenogin, Sergei ^{[4
]}

Keblinski, Pawel ^{[4
]}

Cahill, David G. ^{[2
,3
]}

机构：

[1] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

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

[4] Rensselaer Polytech Inst, Dept Mat Sci & Engn, Troy, NY 12180 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 17期

关键词：

HEAT-FLOW; COMPUTATION; PHONONS; VOLUME;

D O I：

10.1103/PhysRevB.83.174205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pressure dependence of thermal conductivity provides a critical test of the validity of the model of the minimum thermal conductivity for describing heat transport by molecular vibrations of an amorphous polymer. We measure the pressure dependence of the thermal conductivity Lambda (P) of poly(methyl methacrylate) using a combination of time-domain thermoreflectance and SiC anvil-cell techniques. We also determine Lambda (P) from a computational model of amorphous polystyrene. In both cases, Lambda (P) is accurately predicted by the minimum thermal conductivity model via the pressure dependence of the elastic constants and density.

引用

页数：5

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