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The nanostructure deformation mechanism of a predrawn and annealed poly(ether ester) (PEE) thermoplastic elastomer comprising poly(butylene terephthalate) as hard segments and poly(ethylene glycol) as soft segments of a weight ratio 57/43 was studied by means of synchrotron radiation. For this purpose a recently proposed method by Stribeck for extraction of the topological domain structure information contained in the small-angle X-ray scattering (SAXS) patterns was applied to patterns observed as a function of elongation of PEE when measured in the strained and in the relaxed state after straining. The SAXS fiber diagram as a whole was transformed into a three-dimensional chord distribution function (CDF) with fiber symmetry. Assignment of the observed peaks to the various structural characteristics of the PEE is suggested.
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Stribeck et al. (2001) studied this question.
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