Question

Which of the following is not an example of copolymer?

• A. Bakelite
• B. Dacron
• C. Buna-N
• D. Perlan-L

Hint:

If only one monomer repeats throughout the polymer chain, the polymer is a homopolymer.

Answer 1

The Correct Option is D

Step 1: Know the two kinds.
A copolymer is made from two or more different monomers. A homopolymer is made from just one kind of monomer.
Step 2: Check Bakelite.
It comes from phenol plus formaldehyde, two monomers, so it is a copolymer.
Step 3: Check Dacron.
It comes from ethylene glycol plus terephthalic acid, two monomers, so it is a copolymer.
Step 4: Check Buna-N.
It comes from butadiene plus acrylonitrile, two monomers, so it is a copolymer.
Step 5: Check Perlan-L.
Perlan-L (Nylon-6) is made from a single monomer, caprolactam. So it is a homopolymer, not a copolymer.
Step 6: State the answer.
\[ \boxed{\text{Perlan-L}} \]