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← ScienceWhich outcome results when excessive torsion forms in polypropylene?
A)Chain scission and strength reduction✓
B)Increased crystallinity and hardness
C)Enhanced thermal conductivity overall
D)Improved chemical inertness substantially
💡 Explanation
Chain scission occurs because mechanical stress weakens the molecular backbone; thus strain energy promotes chain scission, rather than improved physical properties; therefore strength decreases, rather than increases, given excessive torsion.
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