The stress relaxation curve of a viscoelastic polymer is characterized by a decr

ID: 996385 • Letter: T

Question

The stress relaxation curve of a viscoelastic polymer is characterized by a decrease in stress over time. What causes this decrease?

A.The slow sliding of polymer chains past each other in response to the applied load, which causes the load detected by the load cell to decrease.

B.A decrease in the applied strain, so the sample is not compressed as much, which causes the load detected by the load cell to decrease.

C.The propagation of cracks through the polymer, weakening it, causing the load detected by the load cell to decrease.

D.An increase in the applied strain, eventually rupturing the sample, causing the load detected by the load cell to decrease.

Answer is A decrease in the applied strain, so the sample is not compressed as much, which causes the load detected by the load cell to decrease

The force to hold the material decreases with time.

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