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← ScienceWhich material failure accelerates from persistent high tensile stress in polymers?
A)Creep rupture occurs quite suddenly
B)Covalent bond scission creates microcracks✓
C)Impact stress exceeds tensile strength
D)Hydrogen bonds prevent chain relaxation
💡 Explanation
Microcrack propagation results from stress concentrated on individual polymer chains, leading to covalent bond scission, and fracture. Because covalent bonds break, accelerating the process at the atomic level, premature failure happens rather than ductile behavior that is expected under slower loading.
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