Abstract
General aspects of high performance Brillouin spectroscopy in polymers using special scattering geometries such as 90A-scattenng geometry are discussed. Technical improvements are reported resulting in absolute accuracies up to 0.05 % for sound velocity determination. A method of data analysis is presented delivering simultaneously the complete set of elastic stiffness constants. The influence of birefringence on the Brillouin line shifts in anisotropic polymeric systems is estimated and techniques to reduce this influence are proposed. The determination of the principal refractive indices by Brillouin spectroscopy is discussed. Furthermore, a quantityD X, which is sensitive to hypersonic relaxation processes, is introduced.
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Dedicated to Prof. Dr. H.-G. Kilian on the occasion of his 60th birthday.
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Krüger, J.K., Marx, A., Peetz, L. et al. Simultaneous determination of elastic and optical properties of polymers by high performance Brillouin spectroscopy using different scattering geometries. Colloid & Polymer Sci 264, 403–414 (1986). https://doi.org/10.1007/BF01419544
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DOI: https://doi.org/10.1007/BF01419544