Pressure dependence of the glass transition temperature in molecular liquids and plastic crystals

T. Atake, Charles Angell

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

The effect of pressure on the glass transition temperature of a variety of molecular liquids both hydrogen bonded and non-hydrogen bonded, and their solutions has been investigated. It is found generally that the more extensive the hydrogen bonding in the liquid the smaller is the effect of pressure on Tg. This observation applies also to a binary mixture, in which dTg/dP is found to change linearly between the end member values. The effect of pressure on the glasslike transition in the cyclohexanol plastic crystal phase is as expected for a liquid alcohol. For the lubricant 5P4E, the data are in accord with predictions based on high-pressure light scattering data. The results are interpreted by using the second Davies-Jones relation, dTg/dP = VT(Δα/ΔCp). Some evidence suggesting that the excess entropy frozen in at the glass transition is not quite independent of pressure as often supposed is presented.

Original languageEnglish (US)
Pages (from-to)3218-3223
Number of pages6
JournalJournal of Physical Chemistry
Volume83
Issue number25
StatePublished - 1979
Externally publishedYes

Fingerprint

pressure dependence
glass transition temperature
plastics
Plastics
Crystals
Liquids
liquids
crystals
Cyclohexanols
liquid hydrogen
lubricants
binary mixtures
Binary mixtures
alcohols
light scattering
Light scattering
Lubricants
entropy
Glass transition
Hydrogen

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Pressure dependence of the glass transition temperature in molecular liquids and plastic crystals. / Atake, T.; Angell, Charles.

In: Journal of Physical Chemistry, Vol. 83, No. 25, 1979, p. 3218-3223.

Research output: Contribution to journalArticle

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