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← ScienceWhich outcome occurs when excessive tensile stress breaks polymer chains in epoxy?
A)Reduced structural shear strength✓
B)Increased glass transition temperature
C)Enhanced chemical corrosion resistance
D)Improved thermal conductivity pathway
💡 Explanation
Fracture reduces epoxy's shear strength because covalent bond scission, specifically chain breaking, weakens crosslinking; therefore, shear failure occurs rather than deformation because stress overcomes the bond energy, impacting structural integrity.
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