Small-angle X-ray scattering analysis of craze-fibril structures

Load‐bearing craze fibrils are fundamental to the ability of many polymer materials to support applied tensile stress. Three models of the scattering from craze‐fibril structures have been compared through a rigorous analysis procedure. The results indicate that a diffuse‐boundary model provides a m...

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Bibliographic Details
Published in:Journal of applied crystallography 1999-02, Vol.32 (1), p.71-81
Main Authors: Salomons, G. J., Singh, M. A., Bardouille, T., Foran, W. A., Capel, M. S.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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Summary:Load‐bearing craze fibrils are fundamental to the ability of many polymer materials to support applied tensile stress. Three models of the scattering from craze‐fibril structures have been compared through a rigorous analysis procedure. The results indicate that a diffuse‐boundary model provides a more accurate description of scattering from the fibril structure than the standard Porod‐law technique. Previously reported methods for determining fibril diameters were found to be inappropriate for high‐impact polystyrene (HIPS) materials, overestimating the fibril diameters by as much as 60%. Indirect transforms using regularization theory of the fibril scattering data provide confirmation of the fibril diameters obtained from a power‐law diffuse‐boundary model, which is developed specifically for the craze‐fibril structure of interest.
ISSN:1600-5767
0021-8898
1600-5767
DOI:10.1107/S0021889898010486