Journal
PHYSICAL REVIEW B
Volume 83, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.174205
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Funding
- US Air Force Office of Scientific Research [MURI FA9550-08-1-0407]
- Carnegie- DOE Alliance Center (CDAC) [DE-FC52-08NA28554]
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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.
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