Abstract
A fluid phase is a liquid if the kinetic energies of the molecules and the potential energies of their interaction are comparable, so that the molecules can move ‘viscously’ relative to each other. A fluid phase is a gas if the kinetic energies greatly exceed the potential energies of their interaction. The translative kinetic energies of molecules in crystals are negligible. Conventional liquids possess only short-range order; long-range order is absent. Rheology, which is the first topic of this chapter (sections 6.2 and 6.3), is the mathematical discipline within which relationships between stress and strain in liquids are expressed.
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Suggested Further Reading
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Gedde, U.W. (1999). The Molten State. In: Polymer Physics. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0543-9_6
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DOI: https://doi.org/10.1007/978-94-011-0543-9_6
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