NEW POLYURETHANE BLOCK COPOLYMERS WITH SELF-HEALING PROPERTIES

Polyurethane-polyalkylene oxide block copolymers containing fragments of an adduct capable of reversible chemical transformations by the Diels-Alder reaction have been synthesized and studied for the first time. All obtained compounds were characterized by IR spectroscopy, and viscometry. The temperature transitions and thermal stability of block copolymer melts were determined by using the methods of differential scanning calorimetry and thermogravimetric analysis. The self-healing effect was confirmed using the thermal cycling procedure, which was subjected to pre-damaged samples of modified polyurethanes, and the "sol-gel" method. The perspective of the work begun on the creation of self-healing protective polyurethane coatings are shown.

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