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Related Experiment Videos

Studying morphological variations across single fibres using an X-ray waveguide.

Richard J Davies1, Manfred Burghammer, Christian Riekel

  • 1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble CEDEX, France. rdavies@esrf.fr

Journal of Synchrotron Radiation
|October 22, 2005
PubMed
Summary
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Sub-micrometre beams reveal detailed morphology in poly(p-phenylene benzobisoxazole) (PBO) fibers. Larger beams obscure crucial variations in crystalline structure and orientation across the fiber diameter.

Area of Science:

  • Materials Science
  • Polymer Science
  • Nanotechnology

Background:

  • Poly(p-phenylene benzobisoxazole) (PBO) fibers are high-performance materials.
  • Understanding their morphology is crucial for optimizing properties.
  • Previous studies lacked the resolution to detail microstructural variations.

Purpose of the Study:

  • To investigate morphological variations across single PBO fibers.
  • To compare the efficacy of sub-micrometre versus micrometre-scale beams for analysis.
  • To assess the impact of beam size on crystalline structure and orientation measurements.

Main Methods:

  • Utilized waveguide optics for sub-micrometre beam analysis.
  • Employed glass capillary optics for micrometre-scale beam analysis.

Related Experiment Videos

  • Directly compared morphological data obtained with both optical systems.

    • Main Results:

    • Sub-micrometre beams revealed significant variations in crystalline domain orientation, (200) crystal plane spacing, and reflection intensity across PBO fiber diameters.
    • Larger beams (glass capillary optics) averaged data, obscuring skin-core differences and important features.
    • Skin and core regions showed lower crystalline domain orientation than intermediate zones.
    • Observed variations in (200) crystal plane spacing suggest residual stresses.

    Conclusions:

    • Sub-micrometre beams are essential for detailed morphological studies of single PBO fibers.
    • Beam size critically influences the observation of microstructural features and variations.
    • Analysis indicates residual stresses within PBO fibers due to manufacturing processes.