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The Glass Temperature and the Specific Heat of Apiezon N and T Greases

  • M. M. Kreitman
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 16)

Abstract

The frequent use of Apiezon grease as a thermal bonding agent at cryogenic temperatures has led to interest in its physical properties [1]. Westrum, Chou, Osborne, and Flotow [2] have carried out heat-capacity measurements on a 32.54-g sample of Apiezon T grease. Their results reveal a broad anomaly in the temperature range 205 to 320°K. In a recent note on the specific heat of Apiezon N grease, Bunting, Ashworth, and Steeple [3] have also reported a broad anomalous region (see Fig. 1). Their results disclose a foothill extending from 200 to 260°K and a peak which has a maximum value at about 296°K. It is the purpose of this paper to comment on the specific-heat anomalies and to present evidence that the upturn in the specific heat of Apiezon N and T greases is associated with the glass transition [4] temperature T g.

Keywords

Cryogenic Temperature Glass Temperature Slope Increase Anomalous Region Small Temperature Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    M. M. Kreitman and J. T. Callahan, Cryogenics, 10: 155 (1970).CrossRefGoogle Scholar
  2. 2.
    E. F. Westrum, C. Chou, D. W. Osborne, and H. E. Flotow, Cryogenics, 7: 43 (1967).CrossRefGoogle Scholar
  3. 3.
    J. G. Bunting, T. Ashworth, and H. Steeple, Cryogenics, 9:385 (1969).CrossRefGoogle Scholar
  4. 4.
    F. Bueche, Physical Properties of Polymers, Interscience, London (1962), Chap. 4.Google Scholar
  5. 5.
    R. F. Boyer, J. Appl. Phys., 25:825 (1954).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1971

Authors and Affiliations

  • M. M. Kreitman
    • 1
  1. 1.University of DaytonDaytonUSA

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