Polyurethanes with narrow- and polydisperse hard segment distributions

D. De, R.J. Gaymans

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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 languageUndefined
Pages (from-to)887-894
JournalMacromolecular materials and engineering
Volume293
Issue number11
DOIs
Publication statusPublished - 2008

Keywords

  • IR-68973
  • METIS-254527

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