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← ScienceWhich risk increases for a polymer when molecular chains untangle?
A)Reduced tensile strength occurs✓
B)Lower activation energy appears
C)Increased glass transition stabilizes
D)Higher oxidation rate decelerates
💡 Explanation
Reduced tensile strength occurs because molecular chain entanglement contributes directly to a polymer's resistance to deformation through a mechanism called chain friction. Therefore, disentanglement weakens the material rather than changing stability; rather than lowering activation energies.
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