Question

Which from following polymers is obtained by addition polymerisation method?

• A. Nylon 6
• B. Terylene
• C. Nylon 6,6
• D. Teflon

Hint:

Alkenes (C=C) always form addition polymers.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Polymers are formed via addition (chain-growth) or condensation (step-growth) polymerization. Addition polymerization involves monomers with multiple bonds linking together without the loss of any small molecules.
Step 2: Key Formula or Approach:
Identify the monomers:
Nylon 6 (Caprolactam - condensation/ring opening)
Terylene (Ethylene glycol + Terephthalic acid - condensation)
Nylon 6,6 (Adipic acid + Hexamethylene diamine - condensation)
Teflon (Tetrafluoroethene - addition)
Step 3: Detailed Explanation:
Teflon (Polytetrafluoroethene or PTFE) is synthesized by the polymerization of tetrafluoroethene (\(\text{CF}_2\text{=CF}_2\)) molecules.
Reaction: \[ \text{n CF}_2\text{=CF}_2 \xrightarrow{\text{initiator, pressure}} \text{-(CF}_2\text{-CF}_2\text{)-n} \] Since no small molecules are eliminated and it proceeds via the double bond, it is a pure addition polymer.
Step 4: Final Answer:
Teflon is the addition polymer.