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← ScienceWhich outcome results when applying torque beyond the limit of molecular cohesive forces within an epoxy?
A)De-bonding and adhesive failure occurs✓
B)Increased cross-linking enhances stiffness
C)Viscoelastic creep dominates long-term behavior
D)Rapid glass transition raises service temperature
💡 Explanation
De-bonding happens because applied stress overcomes the intermolecular Van der Waals force, leading to adhesive failure rather than increased cross-linking, because the epoxy matrix reaches its yield strength; therefore, cohesion fails rather than alternative responses like creep at lower stress.
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