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← ScienceWhich risk significantly increases when cross-linking between polymer chains weakens?
A)Increased material creep under sustained load✓
B)Reduced thermal expansion coefficient
C)Higher glass transition temperature
D)Enhanced resistance to oxidation
💡 Explanation
Weakening polymer cross-links compromises structural integrity, causing viscous flow during 'Creep'; chain sliding is enabled via thermal energy, rather than brittle fracture. Therefore, creep resistance decreases because the entanglements become ineffective under stress rather than becoming more resistant.
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