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Which outcome occurs when a polymer's cross-link density exceeds the optimal for shape-memory?

A)Increased elastic return stress
B)Reduced glass transition temperature
C)Prevents complete shape recovery
D)Promotes greater elastic deformation

💡 Explanation

Excessive cross-linking impedes chain mobility, therefore preventing complete shape recovery because it hinders segmental motion, disrupting the entropic elasticity, rather than enhancing elasticity or modifying thermal properties directly.

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