Which is an example of thermosetting polymer?

The correct answer is Bakelite.

• The thermosetting polymer is a polymer that can be irreversibly hardened to the desired shape.
  • It is  hardened by the process of curing of a soft solid or viscous liquid prepolymer or resin.
  • Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst.
  • Once hardened, a thermoset cannot be melted for reshaping.
  • Some examples of a thermosetting polymer are Polyurethanes, Polyurea, Bakelite, Urea-formaldehyde, etc.​

 Additional Information

• A polymer is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits.
• Monomers bonded together in twos, threes, and fours are called dimers, trimers, and tetramers, respectively, and these short repeating units are further called oligomers; depending on the circumstances, these oligomers could also be termed prepolymers, particularly in the context of block copolymers.
  • The point at which monomers or prepolymers combine to a sufficient degree in a single molecule to be specifically called a polymer.
• Copolymers, conversely, are composed of monomers that differ from one another.