Abstract
The thermal conductivity λ of polycarbonate (PC) has been measured in the temperature range 3–150 K under hydrostatic pressure up to 1.3 GPa [Geilenkeuser, R., Weise, F. and Jäckel, M., Czech. J. Physics, 1996, 46, 2251 ( Proc. LT 21, Prag, August 1996)]. A strong influence of pressure on λ has been observed over the entire temperature range. Additional measurements of the pressure dependence of the density showed that the density of PC, polystyrene (PS), epoxy resin and PTFE (Teflon) increased considerably with pressure (Jäckel, M., Weise, F. and Geilenkeuser, R. In Proc. ICEC16/ICMC, Kitakyushu, May 1996, in press). At a pressure of 1.3 GPa the relative increase of the density amounts to 25%. The thermal conductivity data were corrected for the changes of density, sample geometry and sound velocity. The corrected data show an increase of λ with pressure only in the plateau region of thermal conductivity. Similar results were measured for vitreous silica (Jäckel, M., Wagner, K. and Hegenbarth, E., Physica B, 1996, 219&220, 308) and epoxy resin (Grace, J.M. and Anderson, A.C., Phys. Rev. B, 1989, 40, 1901).
Published Version
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