Cauchy relation in relaxing liquids.
J Chem Phys
; 128(21): 214502, 2008 Jun 07.
Article
em En
| MEDLINE
| ID: mdl-18537428
ABSTRACT
The Cauchy-like relation M(infinity) = A + BG(infinity) has recently been found to hold for the high frequency limit values of the longitudinal modulus M(infinity) and transverse modulus G(infinity) of viscoelastic liquids, with B approximately 3 in all the investigated systems. The Brillouin scattering results here reported for curing epoxy systems and thermal glass formers give evidence for the validity of a Cauchy-like relation M(') = A + BG(') for the real part of the elastic moduli measured at finite frequencies. Our results suggest as well the validity of a pure Cauchy relation DeltaM = 3 DeltaG for the relaxation strengths of longitudinal and shear moduli in relaxing liquids.
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MEDLINE
Idioma:
En
Ano de publicação:
2008
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Article