Particle elastic modulus analysis of waterborne polyurethane nanoparticles by ultrasound scattering method
Kaito Tajika,
Tomohisa Norisuye
Abstract:When water is dropped gradually to an acetone solution of concentrated polyurethane containing ionic functional groups, a phase inversion occurs and nanoparticles of waterborne polyurethane (WPU) are formed. Evaporation of water from such aqueous particle suspensions yields polyurethane sheets, but the properties of these sheets are different from those obtained by evaporation of solvent from WPU acetone solutions. In this study, ultrasonic spectroscopy analysis combined with an ultrasonic scattering theory wa… Show more
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