Synthesis and Characterization of Aspartate Ester Polyurea
To obtain polyurea materials with adjustable polymerization rate and strong mechanical properties,a series of polyurea materials were synthesized at room temperature using aliphatic isocyanate and aspartic acid esters,and their structural changes,rheological properties and mechanical properties were studied.The gel time of polymerization reaction is 930 s,which has good workability.The hydrogen bonds in the product undergo a red shift with urea-group characteristics.The hard and soft segments of the polyurea are mixed with strong and hard(PUA984)to soft and tough(PUA980)mechanical properties.The experimental results provide important data support for optimizing the structure of polyurea materials,adjusting their mechanical properties and reaction rate,and enhancing weather resistance and operability.
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