Small-angle light scattering from a distribution of spherulite sizes

Small-angle light scattering from a distribution of spherulite sizes

Depolarized small‐angle light scattering from spherulites in semicrystalline polymers gives rise to a characteristic cloverleaf pattern. For scattering from a single spherulite, the position of the maximum in scattered intensity is readily related to the spherulite radius. For a distribution of sphe...

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Veröffentlicht in:Journal of polymer science. Polymer physics edition 1985-11, Vol.23 (11), p.2395-2406
Hauptverfasser: WISSLER, G. E, CRIST, B
Format: Artikel
Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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container_title Journal of polymer science. Polymer physics edition
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creator WISSLER, G. E
CRIST, B
description Depolarized small‐angle light scattering from spherulites in semicrystalline polymers gives rise to a characteristic cloverleaf pattern. For scattering from a single spherulite, the position of the maximum in scattered intensity is readily related to the spherulite radius. For a distribution of spherulites, the maximum should be related to some characteristic measure of the distribution. It is shown for a wide variety of distributions that this characteristic radius is a ratio of high moments of the size distribution, specifically R * ≈ 〈 R 7 〉/〈 R 6 〉. The shape of the light‐scattering profile should in principal be related to the nature of the spherulite distribution. Calculations of scattering profiles from a variety of distributions fail to demonstrate this, owing to the strong dependence of scattering power on spherulite size. Exceptions are noted for the case of certain bimodal distributions.
doi_str_mv 10.1002/pol.1985.180231112
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
title Small-angle light scattering from a distribution of spherulite sizes
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