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← ScienceWhich consequence results when thermal stress breaks cross-links in vulcanized elastomer?
A)Material becomes permanently more pliable✓
B)Increased glass transition temperature occurs
C)Crystallinity percentage increases linearly
D)Elastic modulus becomes exponentially stable
💡 Explanation
Breaking cross-links leads to chain slippage via decreased Van der Waals forces, because elastomers return to a viscous state, thus decreasing tensile strength and overall stiffness. Therefore, pliability increases markedly, rather than stiffening material or raising transition temperatures.
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