A study of molecular reorientation in a series of liquid n-alkanes using light-scattering spectroscopy |
| |
| Authors: | JV Champion DA Jackson |
| |
| Institution: | 1. Physics Department , City of London Polytechnic , Jewry Street, London, EC3N 2EY;2. The Physics Laboratories , The University , Canterbury, Kent |
| |
| Abstract: | The spectra of the depolarized (VH) light scattered from the n-alkanes C6H14, C8H18, C10H22, C12H26, C14H30, C15H32 and C16H34 have been measured using a high resolution piezo-electrically scanned Fabry-Perot interferometer. The values of the molecular relaxation times τ s derived from the spectra are compared with relaxation times τ f derived from flow birefringence. The experimental results are discussed in terms of a phenomenological activation energy and also in terms of the coupling between the molecular reorientation and the hydrodynamic shear modes, allowing estimates of the strength of the coupling between these modes to be made. |
| |
| Keywords: | |
|
|
