The structure, microphase-separated morphology, and property of polyurethanes and polyureas

The structure-morphology-property relationship of thermoplastic polyurethanes and polyureas was reviewed. The effect of hard segment structure and chemistry, and the hydrogen bonding on the morphology and properties of polyurethanes elastomers was presented. Special attention was made on polyureas with strong bidentate hydrogen bonding, and they are important candidates for thermoplastic elastomers with processibility by careful selection of the hard segment symmetry and hydrogen bonding capacity.