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← ScienceWhen mixing epoxy resin, which outcome slows curing rate disproportionately?
A)Lower viscosity during mixing
B)Excessive hardener is introduced✓
C)Reduced reaction vessel volume
D)Higher surrounding air pressure
💡 Explanation
Excess hardener creates termination reactions reducing crosslinking because the hardener molecules react preferentially with themselves rather than the resin. This inhibits polymerization via chain termination, therefore the curing rate decreases rather than exhibiting faster reactions from increased reactant concentrations.
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