Question

The acrylic fibre is manufactured by wet spinning process rather than melt spinning process due to __________ of acrylic polymer.

• A. high melt viscosity
• B. poor thermal resistance
• C. low melt viscosity
• D. high resistance to heat

Hint:

Always remember: If a polymer "burns" before it "melts," you must use a solvent-based spinning process like wet spinning.

Answer 1

The Correct Option is B

Concept: The selection of a spinning method (melt, dry, or wet) depends entirely on the polymer's response to heat.

Step 1: Understanding Melt Spinning Constraints.
Melt spinning requires the polymer to melt into a stable liquid without breaking down.

Step 2: The Nature of Acrylic Polymer.
Acrylic polymers have a very high degree of intermolecular attraction. As heat is applied, the energy required to melt the polymer is very close to the energy that causes chemical decomposition.

Step 3: Thermal Degradation and Process Choice.
Because of this poor thermal resistance, acrylic polymers undergo permanent chemical degradation before they reach a fluid state suitable for melt spinning. Therefore, it must be solidified in a liquid bath via wet spinning.