Infrared and Raman intensities of polyethylene and perdeuteropolyethylene: Factor group splittings

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Abstract
In a previous work we have calculated the infrared and Raman intensities of polyethylene applying the electro‐optical parameters obtained from simple molecules to a model of single and isolated chains. In this work the validity of such an approximation is discussed. From the comparison of the calculated and experimental intensity ratios of the components of factor group splittings it is concluded that a Hornig’s‐type gas oriented model with no sizeable electrical interactions between molecular chains accounts for the observed infrared and Raman data.