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← ScienceDuring polyethylene production, which mechanism limits molecular weight?
A)Chain transfer to monomer✓
B)Vinyl polymerization acceleration
C)Branch entanglement dominance
D)Reactive end-group termination
💡 Explanation
Chain transfer to monomer terminates the growing polymer chain because a hydrogen atom abstracts from a monomer to the active polymer end, therefore, limiting molecular weight, rather than allowing continuous growth as in propagation.
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