Question

Which of the polymerization techniques is used for synthesis of high molecular weight polymer?

• A. Emulsion
• B. Suspension
• C. Solution
• D. Dispersion

Hint:

Emulsion polymerization is widely used in the rubber and latex industry.

Answer 1

The Correct Option is A

Step 1: Understanding high molecular weight polymers.
High molecular weight polymers require rapid chain growth with minimal chain termination. Such conditions help in achieving long polymer chains with greater molecular mass.
Step 2: Role of polymerization techniques.
In emulsion polymerization, polymerization occurs in micelles where monomer concentration is high and termination reactions are minimized. This favors the formation of polymers with very high molecular weight.
Step 3: Analysis of options.
(A) Emulsion: Correct — It produces polymers with high molecular weight due to controlled radical concentration.
(B) Suspension: Produces moderate molecular weight polymers.
(C) Solution: Molecular weight is limited due to chain transfer to solvent.
(D) Dispersion: Not commonly used for very high molecular weight polymers.
Step 4: Conclusion.
Emulsion polymerization is preferred for synthesizing high molecular weight polymers, making option (A) correct.