Synthesis and Characterization of New Polyurea Elastomers by Sol/Gel Chemistry

A series of elastomers based on polyurea chemistry is synthesized by crosslinking amino‐terminated polyethers with a triisocyanate using an appropriate solvent, which slowed down the reactivity of the amino groups. Control of the reactivity allows the shaping of the material, and films of defined thickness can be achieved for mechanical testing. The strength of the final network can be tuned by the crosslinking density of the network chemical constitution. The resulting materials show a good thermal stability and promising mechanical enhancement. The synthesis of new polyurea networks by organic sol/gel chemistry is presented. For the first time, amino‐terminated polymer melts with reactivity slowed by a capping process allow the well‐defined polymer networks to be obtained when crosslinked with triisocyanates. The resulting elastomers have both chemical and physical crosslinks that enhance the mechanical properties of common polyurethanes or thermoplastic block copolymers.