Polyurethanes (PUs) as a main class of polymeric materials have wide variety of applications such as coatings, adhesives, construction, fibers, foams, and rubbers.1-3 In spite of its applications, unfortunately, conventional polyurethanes exhibit poor heat resistance which limit their applications. For example, their mechanical properties rapidly deteriorate above 80 ˚C and thermal degradation takes place above 200 ˚C.4
