Question

Which of the following is not an example of a condensation polymer?

• A. Nylon 6,6
• B. Dacron
• C. Buna-N
• D. Silicone

Answer 1

The Correct Option is C

To determine which of the given options is not an example of a condensation polymer, we need to understand what condensation polymers are.

Condensation Polymers: These are formed through a condensation reaction where molecules join together, losing small molecules as by-products such as water or methanol.

Let's explore each option:

1. Nylon 6,6: Formed by the condensation polymerization of hexamethylene diamine and adipic acid, releasing water molecules. Thus, it is a condensation polymer.
2. Dacron: Also known as polyethylene terephthalate (PET), synthesized through the condensation polymerization of ethylene glycol and terephthalic acid, releasing water. It is a condensation polymer.
3. Buna-N: Commonly known as nitrile rubber, is formed through the copolymerization of acrylonitrile and butadiene, a process involving addition reactions rather than condensation, making it an addition polymer.
4. Silicone: Formed through a condensation reaction of siloxane units, typically releasing small molecules like hydrochloric acid or water, making it a condensation polymer.

Based on this analysis, Buna-N is not a condensation polymer. It is an addition polymer as its formation involves addition reactions without the loss of small molecules as by-products.