Question

Identify a copolymer from following.

• A. Buna-S
• B. Polyacrylonitrile
• C. Polypropylene
• D. Nylon 6,6

Hint:

Buna-S is a well-known copolymer that is synthesized from two different monomers, butadiene and styrene.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
A homopolymer is made from only one type of monomer. A copolymer is made from two or more different types of monomers.
Step 2: Detailed Explanation:
(A) Buna-S: It is an addition polymer made from two different monomers: 1,3-butadiene and styrene. Thus, it is a copolymer.
(B) Polyacrylonitrile (PAN): Made only from acrylonitrile monomers. It is a homopolymer.
(C) Polypropene: Made only from propene monomers. It is a homopolymer.
(D) Nylon 6,6: It is also a copolymer made from hexamethylenediamine and adipic acid.
Note: In many textbooks, Buna-S is the classic example cited for "copolymer" in the context of synthetic rubbers. Both (A) and (D) are technically correct, but (A) is the primary choice in standard MHT-CET answer keys for this specific set.
Step 3: Final Answer:
Buna-S is a copolymer.