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THz-Spectroscopy on High Density Polyethylene with Different Crystallinity

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Abstract

The different crystallinity states of high density polyethylene (PE-HD) are investigated using THz time-domain spectroscopy by exploiting the complex permittivity at a frequency range from 0.5 up to 3.5 THz. We found that samples with different crystallinity can be distinguished by comparing the material specific refractive index (n) or rather the linked complex part of the permittivity (∈ ′ ′). Correlating the calorimetrically determined degrees of crystallinity with the absolute values of the refractive index and the specific absorption peak at 2.18 THz, respectively, suggests in both cases a linear correlation.

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Correspondence to Stefan Sommer or Thomas Raidt.

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Sommer, S., Raidt, T., Fischer, B.M. et al. THz-Spectroscopy on High Density Polyethylene with Different Crystallinity. J Infrared Milli Terahz Waves 37, 189–197 (2016). https://doi.org/10.1007/s10762-015-0219-8

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  • DOI: https://doi.org/10.1007/s10762-015-0219-8

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