Abstract
Depolarized Rayleigh spectra have been obtained for n-dodecane, n-hexadecane, n-docosane, n-octacosane, n-hexatriacontane, and Polywax 1000, a linear polyethylene of nominal molecular weight 1000, as a function of temperature in the melt. Relaxation times determined from the spectral linewidths have been analyzed in terms of the reorientational motions of the molecules. For the lower n-alkanes, the average relaxation time is determined primarily by overall molecular reorientation. For the higher n-alkanes and Polywax 1000, there is definite evidence that intramolecular conformation changes are contributing to the linewidths.
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