Question

Which of the following is an example of a thermosetting polymer?

A.
B.
C.
D.

Answer 1

Thermosetting polymer: These are those polymers (especially plastics) that once molded cannot be deformed or bent on heating are known as thermosetting polymers.

Complete Solution :

This is the structure of neoprene rubber which is an elastomer.
Elastomer, any rubbery material made out of long chainlike atoms, or polymers, that are equipped for recuperating their unique shape subsequent to being extended to extraordinary.

This is the structure of PVC (polyvinyl chloride) which is a thermoplastic polymer.

- Thermoplastic polymer:
Those plastics which can be pliable on warming over a specific temperature and adjust another shape on cooling, are called thermoplastic polymers. They generally have a high atomic weight.

This is the structure of nylon-6,6 which is a fiber. Fibers are long filamentous-like structures that can be rolled together to form threads. They can be obtained from a wide variety of sources. Nylon-6,6 is formed by the condensation polymerization reaction of the two monomeric units that is adipic acid and hexamethylenediamine and both of these contain six carbon atoms each. Hence 6,6 in nylon-6,6 represents those carbon atoms.

D. Bakelite is a thermosetting polymer which has the following structure:

Bakelite is a phenol-formaldehyde polymer that is used for making combs, phonograph records, electrical switches, and handles of various utensils.
So, the correct answer is “Option D”.

Note: The possibility of making a mistake is that you may confuse between thermosetting and thermoplastic polymers. Thermosetting polymers are those that can be molded once and cannot be reshaped while thermoplastics are those which can be molded and reshaped.