Microstructure Analysis Using Temperature Induced Contrast Variation in Small-Angle Scattering

Published

June 1, 2000

Author(s)

J D. Barnes, R Kolb, K A. Barnes, A Nakatani, Boualem Hammouda

Abstract

We propose to introduce Temperature-Induced Contrast Variation (TICV) as a technique for improving the specificity of microstructure analyses obtained using small-angle scattering methods. TICV exploits the fact that, at temperatures well below the melting or annealing regimes, the scattering contrast in many multicomponent systems exhibits a significant temperature dependence while the form factors for the scattering processes change only slightly. The thermal expansion coefficient of the amorphous component on either side of the glass temperature of semicrystalline glassy polymers gives rise to a sharp change int he scattered intensity as the polymer is heated through its glass transition range.Under suitable conditions a careful application of the TICV procedure allows for effective partitioning of the observed scattering patterns into separate components for differing scattering mechanisms.The experimental data presented here provide qualitative demonstrations of general features of the method. Further work is needed to obtain improved descriptors to characterize microstructure in these systems.

Proceedings Title

International Conference on Small-Angle Scattering | 11th | | Mundsgaard International

Volume

33

Issue

No. 1

Conference Dates

May 1, 1999

Conference Title

Journal of Applied Crystallography

Pub Type

Conferences

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Keywords

microstructure, semicrystalline polymers, small angle scattering

Citation

Barnes, J. , Kolb, R. , Barnes, K. , Nakatani, A. and Hammouda, B. (2000), Microstructure Analysis Using Temperature Induced Contrast Variation in Small-Angle Scattering, International Conference on Small-Angle Scattering | 11th | | Mundsgaard International, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851550 (Accessed April 24, 2024)