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← ScienceWhich consequence primarily results when polymers soften at high-temperatures?
A)Reduced chain entanglement lowers strength✓
B)Increased crystallinity stabilizes structure
C)Enhanced cross-linking increases stiffness
D)Higher polymerization creates larger molecules
💡 Explanation
Increased molecular motion allows polymer chains to slip past one another via chain disentanglement, because Van der Waals bonds weaken. Therefore, the tensile strength reduces, rather than maintaining integrity like cross-linking would.
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