Effects of Materials Structure on Mechanism and Kinetics ofthe Reaction of Polyurethane and the Final Properties ofPolymers

Polyurethanes are constituted from three main components of poly-l, chain extender, and isocyanate baking agent. The molecules structure is molecular resonance and the compounds aromaticity have significant effect on polymers’ final properties. For example, as the molecular symmetry of one of these three elements is more, the made polymer will have better molecular arrangement and thermal andmechanical properties. In addition, the presence of resonance in isocyanate structures increases the speed of polymerization and reactivity. Aromaticity also makes an increase in the charges of reacted active centers and accelerate polymerization.. This action increases pot life

Keywords:

aromaticity , polyurethane , chain extender , thermal properties , mechanical properties , molecular resonance