Abstract

During the melting and crystallization of uniaxially oriented polyethylene small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) patterns are recorded simultaneously and continuously, i.e. with high signal-to-noise ratio and a time resolution of 7 s. The multidimensional chord distribution function (CDF) is computed from each of the SAXS patterns and visualises the nanodomain structure of the material in physical space. Thus without application of a model a detailed and continuous multidimensional stream of data is obtained that reveals the mechanisms which govern melting and crystallization in the material studied. Finally the CDF is semi-quantitatively analysed as a function of the temperature programme.

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