Question

Dimethyl formamide (DMF) at boil is a solvent for

• A. Acrylic
• B. Nylon 6
• C. Nylon 66
• D. Wool

Hint:

DMF is widely used as a solvent for acrylic polymers due to its strong polarity and high boiling point.

Answer 1

The Correct Option is A

Step 1: Understanding DMF as a solvent.
Dimethyl formamide (DMF) is a strong polar aprotic solvent capable of dissolving certain synthetic polymers when heated to its boiling point.
Step 2: Behaviour of acrylic fibres.
Acrylic fibres, primarily composed of polyacrylonitrile, are soluble in DMF at elevated temperatures. Hence, DMF is commonly used as a solvent for acrylic polymers in fibre manufacturing and testing.
Step 3: Eliminating other options.
Nylon 6 and Nylon 66 are polyamides and are not dissolved by DMF under normal conditions. Wool is a natural protein fibre and is insoluble in DMF.
Step 4: Conclusion.
Therefore, DMF at boiling temperature acts as a solvent for acrylic fibres.