On the viscoelastic properties of n-alkane liquids

Mark G. Sceats*, Judith M. Dawes

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The extant experimental data for the n-alkanes (pentane-hexadecane) derived from ultrasonic absorption, Brillouin and Rayleigh light scattering, and low frequency shear viscosity measurements are analyzed in terms of a model which decomposes the frequency dependent shear and longitudinal viscosities into contributions arising from trans-gauche rotational isomerism, rotational reorientation, and structural relaxation. The results yield values of the transverse and longitudinal structural relaxation times, and indicate that there is a strong coupling of molecular reorientation to adiabatic compression as well as to shear, presumably because the existing orientational correlations between chains are perturbed by the temperature variations during adiabatic compression.

Original languageEnglish
Pages (from-to)1298-1304
Number of pages7
JournalThe Journal of Chemical Physics
Volume83
Issue number3
Publication statusPublished - 1985
Externally publishedYes

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