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Polyurethane ElastomersPolytetramethylene GlycolFourier Transform Infrared SpectroscopyPolyurethane ElastomerDifferential Scanning CalorimetryDynamic Mechanical AnalysisMechanical PropertiesGlass Transition TemperatureAtom Transfer Radical PolymerizationWaterborne PolyurethaneBlock CopolymerThermal StabilityProperties of PolymerMolecular WeightPolyvinyl Acetate EmulsionLight FasteningDimethylolpropionic AcidChlorosulfonated PolyethyleneHigh Molecular WeightScanning Electron Microscopy