Melting, Solidification, and Crystallization of a Thermoplastic Polyurethane as a Function of Hard Segment Content
Stribeck, Almut (Institute of Technical and Macromolecular Chemistry)
Eling, Berend (Institute of Technical and Macromolecular Chemistry)
Pöselt, Elmar (BASF Polyurethanes GmbH)
Malfois, Marc (Laboratori de Llum del Sincrotró ALBA)
Schander, Edgar (BASF Polyurethanes GmbH)

Date:	2019
Abstract:	Thermoplastic polyurethanes (TPU) with varying hard segment contents (HSC) are monitored during melting and solidifying (20 K/min , Tmax = 220 ° C) by small-angle and wide-angle X-ray scattering (WAXS and SAXS). Hard segments: MDI/BD. Soft segments: PTHF1000. The neat materials are injection-molded, having small amorphous hard domains (chord length d⎯⎯h < 6 nm ). Results indicate complexity of morphology changes. For example, crystals are predominantly produced in freshly segregated, sufficiently large hard domains, while the temperature decreases slowly enough. After the thermal treatment, only the materials with HSC.
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Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Crystallization ; Thermoplastic ; Polyurethane
Published in:	Macromolecular Chemistry and Physics, Vol. 220, Issue 11 (June 2019) , art. 1900074, ISSN 1022-1352

DOI: 10.1002/macp.201900074

Postprint 23 p, 1.4 MB

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