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← ScienceWhich mechanism limits polymerization when monomer purity decreases?
A)Chain termination by radical scavenging✓
B)Increased initiation rate and crosslinking
C)Propagation rate enhanced by impurities
D)Thermal runaway accelerates monomer consumption
💡 Explanation
Decreased monomer purity introduces radical scavengers; because these molecules react with propagating polymer chains, further monomer addition ceases, therefore terminating chain growth; rather than accelerating polymerization which would be caused by increased catalyst concentration.
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