Asimpleone-potnon-isocyanaterouteforsynthesizingthermoplasticpolyureasispresented.Insituurethanizationwasconductedfromthering-openingreactionofethylenecarbonatewithpoly(propyleneglycol)bis(2-aminopropylether)andhexanediamine,m-xylylenediamine,ordiethyleneglycolbis(3-aminopropyl)etherat100℃for6hundernormalpressure.Melttransurethanepolycondensationwassuccessivelyconductedat170℃underareducedpressureof399Pafordifferenttimeperiods.Aseriesofnonisocyanatethermoplasticpolyureas(NI-TPUreas)wereprepared.TheNI-TPUreaswerecharacterizedbygelpermeationchromatography,FTIR,1H-NMR,differentialscanningcalorimetry,thermogravimetricanalysis,wide-angleX-raydiffraction,atomicforcemicroscopy,andtensiletest.NI-TPUreasexhibitedMnofupto1.67×10^4g/mol,initialdecompositiontemperatureover290℃,andtensilestrengthofupto32MPa.SeveralcrystallizableNI-TPUreasexhibitedTmexceeding98℃.NI-TPUreaswithgoodthermalandmechanicalpropertieswerepreparedthroughagreenandsimpleone-potnon-isocyanateroute.
