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A strip of elastomer 1 cm×1 cm×10 cm is stretched to 25 cm length at T...

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Mechanical Engineering

A strip of elastomer 1 cm×1 cm×10 cm is stretched to 25 cmlength at T =25C, a stress of 1.5 MPa being required

(a) Assuming a tetrafunctional crosslinking mode, how many molesof network chains are there per cubic centimeter?

(b) What stress is required to stretch the sample to only 15 cmat T = 25C?

(c) What stress is required to stretch the sample to 25 cmlength at 100C?

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