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Properties of Polyether-polyurethane Zwitterionomers by Kirk K. S. Hwang; Chang-Zheng Yang; Stuart L. Cooper is a Materials Science article available to read on EtoBox.

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## Abstract Polyether polyurethanes based on 4,4′‐diphenylmethane diisocyanate (MDI), N‐methyl diethanolamine (MDEA), and polytetraniethylene oxide (PTMO) were synthesized with varying levels of hard segment content. The tertiary amine of MDEA was sulfonated with γ‐propane sultone thereby converting the polyether polyurethane to a polymeric zwitterion. The effect of the chemical composition and the degree of ammonium sulfonation on the extent of phase segregation, and physical properties were studied by differential scanning calorimetry (DSC), dynamic mechanical analysis and tensile testing. It was found that the MDEA chain extender inhibits microphase separation of the polymer in the solid state. As the degree of ammonium sulfonation increases in the zwitterionomers, an improvement of phase separation and domain structure was observed. In addition the tensile properties change dramatically with increasing sulfonate content going from properties characteristic of soft, weak gum rubbers to those of hard, strong thermoplastic elastomers.

Who reads Properties of Polyether-polyurethane Zwitterionomers?

Author

Kirk K. S. Hwang; Chang-Zheng Yang; Stuart L. Cooper

Publisher

Society for Plastic Engineers; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0032-3888)

Published

1981

Language

EN

Field

Materials Science (Physical Sciences)