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Low temperature thermal relaxation in polymethyl methacrylate (pmma)

✍ Scribed by J. Zimmermann

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
163 KB
Volume
24
Category
Article
ISSN
0011-2275

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✦ Synopsis

Strong thermal relaxation effects of low energy excitations have been studied in polymethyl methacrylate (PMMA) at low temperatures. These excitations are characteristic of the amorphous structure and their relaxation gives rise to large apparent heat leaks after temperature changes in low temperature apparatus. Because of this, non-crystalline materials are generally used as little as possible in very low temperature work. Our experimental results are discussed in terms of the tunnelling mode/appropriate for these excitations.

Low temperature thermal relaxation in polymethyl methacrylate (PMMA)

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