In this paper, different types of polyurethane foams (PUR) having various chemical compositions have been produced with a specific density to monitor the microstructure as much possible. The foam may preferential orientation in cell structure. cellular tends stubborn, typical systems strong overlap reversibility. Free expansion under atmospheric pressure enables formulas grow until they are ref...

Polyurethane foams currently dominate the global foam market. Nevertheless, main drawback of these remains use toxic isocyanate reagents. To overcome this issue, several ways have been explored. The most promising route appears to be aminolysis 5-membered cyclic carbonates leading formation polyhydroxyurethanes (PHUs). However, lack reactivity systems using C5-cyclic limits application range PH...