Journal
PHILOSOPHICAL MAGAZINE
Volume 91, Issue 13-15, Pages 1977-1986Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2010.536176
Keywords
glass formers; liquid state; elastic properties
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Finite shear elasticity has been identified in the liquid state. The study is expanded to a van der Waal's molecular glass-former, o-terphenyl, and to an ordinary polymer melt, polybutylacrylate, as a function of their molecular weight. These fluids exhibit shear elasticity at the sub-millimetre scale and far above any phase transition. This macroscopic property challenges the conventional terminal relaxation modes (alpha-process or terminal viscoelastic times (reptation)) in terms of individual molecular process.
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