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Which risk increases when an unmixed two-component epoxy resin system is applied under ambient conditions?

A)Incomplete curing reaction rate
B)Excessive exothermic polymerization
C)Rapid solvent evaporation rate
D)Formation of crystalline microstructures

💡 Explanation

When an epoxy resin system is applied without adequate mixing, the polymerization catalysts don't distribute properly, depressing area-specific reaction rates because the average distance between reactive components is excessive. Therefore, the rate decreases yielding an incomplete curing rather than excessive polymerization, evaporation, or crystallization which require different non-ideal states.

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