Polyurethanes with Narrow- and Polydisperse Hard Segment Distributions

De, Debasish and Gaymans, Reinoud J. (2008) Polyurethanes with Narrow- and Polydisperse Hard Segment Distributions. Macromolecular Materials and Engineering, 293 (11). pp. 887-894. ISSN 1438-7492

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Abstract:	Polyurethanes with narrow-disperse (ND) and polydisperse (PD) hard segment (HS) distributions were prepared in a two-step process. First, a poly(propylene oxide) end-capped with MDI (4,4methylenebis(phenyl isocyanate) was synthesized. To this prepolymer either a diamine-diamide was added to form ND HSs or a mixture of a diamine-diamide and additional MDI to form PD HSs in the copolymers. The polyurethanes displayed a ribbon-like crystalline morphology, and it was found that the copolymers with ND HSs were more crystalline, had a higher modulus, a less temperature-dependant modulus, and a higher melting temperature than their PD counterparts. Overall, the polyurethanes with the narrow-dispersed HSs displayed superior properties.
Item Type:	Article
Copyright:	© 2008 Wiley-VCH Verlag
Research Group:	Polymer Chemistry and BioMaterials (PBM)
Link to this item:	http://purl.utwente.nl/publications/68973
Official URL:	http://dx.doi.org/10.1002/mame.200800147
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