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Experimental investigation of thermal properties and Grueneisen parameter of aligned polycarbonate at low temperatures

✍ Scribed by U. Escher; F. v. Schoenebeck; M. Jäckel; A. Gladun

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
138 KB
Volume
38
Category
Article
ISSN
0011-2275

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✦ Synopsis

Thermal expansion ␣, specific heat capacity c and thermal conductivity of untreated and stretched polycarbonate (PC) have been measured at temperatures above 4.2 K and the Grueneisen parameter ␥ has been calculated from ␣ and c. All properties exhibit typical low-temperature features of amorphous solids. The specific heat c is not influenced by stretching, ␣, ␥ and , however, get very anisotropic. The temperature dependence of ␣, and ␥ changes distinctly when mechanically loaded or oriented. The Grueneisen parameter ␥(T) shows a maximum at 10 K for untreated PC and at 20 K for stretched PC.

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