Question

Which of the following is an example of a co-polymer?

• A. Nylon
• B. Polyester
• C. Teflon
• D. Buna-S

Answer 1

The correct option is D

Buna-S

Explanation for correct option:

D. Buna-S

Co-polymer:

• “Copolymerisation is a polymerization reaction in which a mixture of more than one monomeric species is allowed to polymerize and form a copolymer.”
• The copolymer can be made by both methods of chain growth as well as step-growth polymerization.

Buna-S:

• Buna-s is a copolymer that is formed by a mixture of buta–1, 3–diene and styrene.
• The chemical reaction can be depicted as:

• It is tough in nature and can be used as a substitute for rubber.

Explanation for incorrect options:

Polymers:

• “The term polymer is defined as very large molecules having high molecular mass $({10}^3-{10}^7\mathrm{u})$.”
• “These are also referred to as macromolecules, which are formed by joining of repeating structural units on a large scale.”

(A) Nylon

• Nylon is used for the manufacture of tire cords, and ropes.
• Polyamide polymers, known as nylons, include amide bonds and are significant examples of synthetic fibers.

(B)Polyester

• These are the polycondensation products of dicarboxylic acids and diols.
• Dacron or terylene is an example of polyesters.

(C)Teflon

• Teflon is manufactured by heating tetrafluoroethene with a free radical or persulphate catalyst at high pressures.

Hence, the correct option is D i.e. Buna-S.