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- W147298766 abstract "Results of two methods for the quantitative analysis of two-dimensional (2D) small-angle X-ray scattering (SAXS) patterns with fiber symmetry are presented. Experimental data originate from studies of poly(ether ester) (PEE) thermoplastic elastomer materials recorded during straining experiments at a synchrotron beamline. The first steps of both methods are similar. By suitable projection of the 2D image data onto a line (longitudinal scattering, first method) or onto a plane (transverse scattering, second method) scattering curves are extracted, which finally can be analyzed in terms of two-phase structural models considering soft domains and hard domains inside the PEE. The studied longitudinal scattering in principal is one-dimensional and originates from chords crossing the soft and hard domains parallel to the direction of strain only. From these curves interface distribution functions (IDF) are computed and analyzed using an advanced stacking model. Not only the average domain heights, but four parameters characterizing each of two height distributions (hard and soft domains) are determined as a function of elongation. With several PEE materials strong equatorial scattering is observed during elongation. The equatorial scattering is similar to the frequently discussed void scattering but originates from an ensemble of rodlike soft domains (needles) in the sample, oriented parallel to the direction of strain. It can be studied using the second method. From the transverse scattering the 2D chord distribution is computed, from which the diameter distribution of the soft needles can be extracted. It is investigated as a function of strain." @default.
- W147298766 created "2016-06-24" @default.
- W147298766 creator A5078753046 @default.
- W147298766 date "1999-07-30" @default.
- W147298766 modified "2023-09-25" @default.
- W147298766 title "Analysis of SAXS Fiber Patterns by Means of Projections" @default.
- W147298766 cites W585539282 @default.
- W147298766 doi "https://doi.org/10.1021/bk-2000-0739.ch003" @default.
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