Question

Match the polymer processing operation with respect to its typical range of shear rate. 

• A. P-3, Q-4, R-2, S-1
• B. P-1, Q-3, R-2, S-4
• C. P-2, Q-4, R-3, S-1
• D. P-3, Q-2, R-1, S-4

Hint:

Shear rate is an important factor in polymer processing operations, as it influences the flow and behavior of materials during processing.

Answer 1

The Correct Option is A

Step 1: Analyze the shear rates for the processing operations.
P. Compression Moulding: This operation typically involves a shear rate of 3, which is in the range of 1 - 10 s\(^{-1}\).
Q. Extrusion: This operation involves a shear rate of 4, which is in the range of 100 - 1000 s\(^{-1}\).
R. Calendering: This operation involves a shear rate of 2, which is in the range of 10 - 100 s\(^{-1}\).
S. Injection Moulding: This operation involves a shear rate of 1, which is in the range of 1000 - 10000 s\(^{-1}\).

Step 2: Conclusion.
Thus, the correct matching is: P-3, Q-4, R-2, S-1. The answer is (A).

Final Answer: (A) P-3, Q-4, R-2, S-1