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← TechnologyWhich risk dramatically increases when exceeding cooling limits during reactive curing of a thick resin casting against a steel mold?
A)Exothermic process accelerates uncontrollably
B)Material properties become non-isotropic
C)Thermal stress induces cracking✓
D)Resin viscosity decreases unexpectedly
💡 Explanation
Thermal stress increases because differential thermal contraction using the constraint of a rigid mold causes internal strain known as the interfacial stress mechanism, therefore induces cracking of the casting, rather than uniform shrinkage or accelerated curing.
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