| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|
|---|---|---|
| Page(s) | C6-69 - C6-71 | |
| DOI | https://doi.org/10.1051/jphyscol:1981621 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-69-C6-71
DOI: 10.1051/jphyscol:1981621
Department of Physics, University of Leeds, Leeds LS2 9JT, England
J. Phys. Colloques 42 (1981) C6-69-C6-71
DOI: 10.1051/jphyscol:1981621
THE THERMAL CONDUCTIVITY OF SEMICRYSTALLINE POLYMERS AT VERY LOW TEMPERATURES
D. Greig et N.D. HardyDepartment of Physics, University of Leeds, Leeds LS2 9JT, England
Abstract
For polyethylene the temperature dependence of thermal conductivity decreases below a temperature T* - in this case 1K - from T2 to T. We now present experimental results on a lightly modified form of polyethylene for which T* is raised to between 3K and 9K. There appears to be a correlation between T* and the microcrystalline structure and we speculate that for semicrystalline polymers in this temperature range structure scattering is more important than 2-level tunnelling.