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← ScienceWhich outcome results when epoxy resin is heated excessively?
A)Decreased tensile strength develops in matrix✓
B)Increased electrical conductivity ensues
C)Improved resistance to solvent attack
D)Enhanced structural temperature stability.
💡 Explanation
High temperatures break the cross-links via thermal degradation; causing weaker secondary bonds rather than maintaining robust covalent bonds. Therefore, tensile strength decreases due to chain mobility, rather than the other effects which rely on stronger, undamaged polymer structures.
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