This Paper is a review of the factors that determine the thermal conductivity of polymers below 100 K. Starting from the 'universal' behaviour found in all amorphous solids we shall examine how far this can be changed when we come to consider semicrystalline polymers, and the further changes that ca
Low temperature thermal conductivity of Kevlar
โ Scribed by G Ventura; M Barucci; E Gottardi; I Peroni
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 142 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0011-2275
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โฆ Synopsis
We measured the thermal conductivity of a Kevlar cord, 0.8 mm in diameter, in the 0.1ยฑ2.5 K temperature range. The data were ยฎtted with a power-law: k 3X9 AE 0X2 ร 10 ร5 T 1X17AE0X04 Wacm K. Our results are in good accordance with the existing data at T b 2 K.
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A mechanical support system is described for a space-borne 3He refrigerator that relies on Kevlar 29 braided cords to achieve thermal isolation at temperatures ranging from 0.3 to 40 K. Measurements of the Young's modulus, tensile strength, creep and thermal conductivity of Kevlar cords at room and
Thermal conductivity of polyamide-imide Torlon 4203 was measured at temperatures between 0.1K and IK. The measurements were carried out in a dilution refrigerator using a steady state technique. The fit on the data gave a temperature dependence of the conductivity: k = c~ โข T ~, with n = 2.23 :t: 0