Polyurethanes are very important polymer that can be found as thermoplastics, thermosettings and elastomers. In here, we will discuss the thermoset polyurethanes and their applications and properties.
What Is Thermoset Polyurethane?
Polyurethanes are very complex structures and can not be contained in a specific group in polymers. The common thing around polyurethanes is the urethane froup that they are including. The chemical representation of urethane group is NHCOO. Reaction of polyols which contains branches of -OH groups that butylene ether glycol(C4H10O2) with isocyanate auch as diphenylmethane diisocyanate (C15H10O2N2) is an example for production of polyurethanes.
Thermosetting and elastomeric polyurethanes are most important groups. Polyurethanes are used as foams in applications generally, and this foam structure can be ranging from rigid to elastic. Some of applications that polyurethane foams are used in;
- Rigid foams are used in refrigerator walls as thermal insulator. Also it gives very good structural stablity to refrigerator itself.
- Also some varnishing and coating processes are also done with polyurethane foams.
Properties Of A Polyurethane Example
In here, we will give information about a polyurethane that is synthesized from reaction of a polyol and isocyanate. The general production method is step polymerization. Elongation characteristics depends on the cross-linking that is produced in production steps. Also modulus of elasticity depends on the process that thermoplastics, thermosettings or elasomer polyurethane is produced. Tensile strength of polyurethane is around 30 MPa.
These are the general characteristics of polyurethanes. Do not forget to leave your comments and questions about polyurethanes below. Your precious feedbacks are very important for us.