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← ScienceWhich consequence results when a catalyst poisons a Ziegler-Natta polymerization process?
A)Stereoregularity of polymer chains decreases✓
B)Polymer molecular weight dramatically increases
C)Exothermic reaction generates uncontrolled heat
D)Chain transfer generates shorter polymers
💡 Explanation
Decreased stereoregularity occurs because catalyst poisoning interrupts the surface polymerization mechanism reducing the ability to control the stereochemistry during chain growth. Therefore, the polymer becomes less ordered, rather than increasing order because the active sites are blocked.
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