Question

Which from following polymers is obtained by condensation polymerisation method ?

• A. \([\,\text{CF}_2-\text{CF}_2\,]_n\)
• B. \([\,\text{CH}_2-\text{CH}_2\,]_n\)
• C. \([\,\text{NH}-(\text{CH}_2)_5-\text{CO}\,]_n\)
• D.

  

Hint:

Condensation polymerisation joins two different monomers with loss of small molecules like water.

Answer 1

The Correct Option is D

Step 1: Understand the concept
Condensation polymerisation joins bifunctional monomers with the loss of a small molecule such as water or HCl. Addition polymerisation joins unsaturated monomers without any loss.

Step 2: Check (A) and (B)
\([\text{CF}_2-\text{CF}_2]_n\) (Teflon) comes from tetrafluoroethene, and \([\text{CH}_2-\text{CH}_2]_n\) (polythene) comes from ethene. Both are made by addition of a double bond monomer.

Step 3: Check (D)
The structure in (D) is \([\text{CO}-(\text{CH}_2)_4-\text{CO}-\text{NH}-(\text{CH}_2)_6-\text{NH}]_n\), which is nylon-6,6. It is made from adipic acid and hexamethylenediamine with loss of water, a typical condensation polymerisation.

Step 4: Option (C)
Option (C), nylon-6, is made from caprolactam by ring opening and is the other polyamide in the list. Nylon-6,6 in option (D) is the standard example of condensation polymerisation, so (D) is the answer.

Final Answer:
Nylon-6,6 is the textbook condensation polymer. This is option (D). \[ \boxed{\text{(D) }\text{Nylon-6,6}} \]