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← ScienceWhich consequence results when thermal stress fractures epoxy?
A)Decreased adhesive joint shear strength✓
B)Increased polymer chain crosslinking
C)Enhanced hydrolytic degradation resistance
D)Improved elastic modulus isotropy
💡 Explanation
Debonding arises from fracture because thermal stress exceeds epoxy's cohesive strength, initiating crack propagation via chain scission, i.e. covalent bond breaking. Therefore, adhesive joint strength severely decreases, rather than crosslinking increases, which would improve its resistance.
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