Write note on Poly Urethanes
Polyurethanes (PU) are a class of polymers composed of organic units joined by carbamate (urethane) links. They are produced by reacting diisocyanates with polyols. The properties of polyurethanes can be varied by adjusting the type and ratio of the reactants, as well as by the use of additives. Applications: Foams: Polyurethane foams are used in […]