Universität zu Köln

Wenning, Christian, Schmidt, Annette M. and Leimenstoll, Marc C. (2020). Evolution of Reaction-Induced Phase Segregations in Bi-Soft Segment Urethane Oligomers. Macromol. Chem. Phys., 221 (5). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1521-3935

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Abstract

Oligomeric bi-soft segment isocyanate-terminated polyurethanes (ITPUs) are semi-finished goods crucial for the fabrication of various polyurethane (PU) products such as foams, thermoplastics, adhesives, dispersions, and elastomers. Incompatibilities and thus phase segregation phenomena play an essential role in tailoring the properties of the final products. In this work, the evolution of reaction-induced phase segregation (RIPS) in ITPUs is explored in terms of composition and morphology of the phase segregated products as well as competing second order kinetics of the reaction. The results suggest that mechanism and extent of the phase segregation are thermodynamically controlled following the ternary phase diagram of the reactants. A comprehensive description of the phase behavior during the reaction is provided demonstrating excellent control over the morphology of ITPUs by means of appropriate adjustment of the initial reactant composition. These results are fundamental for tailored morphology design as it is employed for instance in membrane synthesis.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wenning, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Annette M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Leimenstoll, Marc C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-348076
DOI:	10.1002/macp.201900458
Journal or Publication Title:	Macromol. Chem. Phys.
Volume:	221
Number:	5
Date:	2020
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1521-3935
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HYDROXYL-TERMINATED POLYBUTADIENE; KINETICS; POLYURETHANES; DIISOCYANATE; POLYMER; SEPARATION; MORPHOLOGY; COPOLYMERS; ISOCYANATE; BULK Multiple languages Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/34807