Abstract
AbstractBinary mixtures of n‐paraffins have been examined by Raman spectroscopy in order to elucidate the nature of the perturbations on the chains. For a short‐chain species diluted in a longer‐chain species, the longitudinal acoustic mode frequency of the former decreases from its value in the pure state to that corresponding to a chain with free ends. This observation, as well as others, confirms our previous suggestions that longitudinal perturbing forces are responsible for increasing this frequency over its unperturbed value. These results also provide new insights into the structures present in solid solutions of n‐paraffins. They reemphasize the necessity of incorporating the effects of such perturbations in applications of the longitudinal acoustic mode to morphological studies of polymers.
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