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Microstructure characterization in a single isotactic polypropylene spherulite by synchrotron microfocus wide angle X-ray scattering
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. DESY, Hamburg, Germany.
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2018 (English)In: Polymer, ISSN 0032-3861, E-ISSN 1873-2291, Vol. 142, p. 387-393Article in journal (Refereed) Published
Abstract [en]

Position-resolved microstructure in a single spherulite of iPP is quantitatively studied by synchrotron microfocus wide angle X-ray scattering. The results show that the normal of mother lamellae in a spherulite is aligned mainly perpendicular to the radius, and the subsidiary daughter lamellae are inclined 80.75° with respect to that of the dominant mother lamellae. The crystallinity in the spherulite is in the range of 46%–56%, which is rarely influenced by the crystallization temperature. The ratio between the daughter lamellae and the mother lamellae is 0.18 when iPP crystallizes at 138 °C and it decreases to 0.11 as the crystallization temperature is decreased to 130 °C. The b-axis and c-axis in the mother lamellae tend to orient perpendicular to the radius direction, and the a-axis prefers to align in the radius direction.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 142, p. 387-393
Keywords [en]
Spherulite, Synchrotron, Wide angle X-ray scattering
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-227597DOI: 10.1016/j.polymer.2018.03.061ISI: 000430358900039Scopus ID: 2-s2.0-85044766492OAI: oai:DiVA.org:kth-227597DiVA, id: diva2:1206954
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QC 20180518

Available from: 2018-05-18 Created: 2018-05-18 Last updated: 2018-05-18Bibliographically approved

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Roth, Stephan V.

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