Polyurethanes with narrow- and polydisperse hard segment distributions

D. De; R.J. Gaymans

doi:10.1002/mame.200800147

Polyurethanes with narrow- and polydisperse hard segment distributions

D. De, R.J. Gaymans

Biomaterials Science and Technology

Research output: Contribution to journal › Article › Academic › peer-review

5 Citations (Scopus)

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.

Original language	Undefined
Pages (from-to)	887-894
Journal	Macromolecular materials and engineering
Volume	293
Issue number	11
DOIs	https://doi.org/10.1002/mame.200800147
Publication status	Published - 2008

Keywords

IR-68973
METIS-254527

Access to Document

10.1002/mame.200800147

Cite this

De, D., & Gaymans, R. J. (2008). Polyurethanes with narrow- and polydisperse hard segment distributions. Macromolecular materials and engineering, 293(11), 887-894. https://doi.org/10.1002/mame.200800147

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AB - 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.

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