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← ScienceWhich consequence results when polyethylene's thermal degradation exceeds limit?
A)Chain scission reduces molecular weight✓
B)Increased crosslinking elevates tensile strength
C)Crystallinity rises lowering impact resistance
D)Plasticizers exude restoring chain mobility
💡 Explanation
When polyethylene's degradation limit is exceeded, chain scission occurs because bonds break randomly throughout the polymer matrix; therefore, molecular weight decreases, rather than crosslinking because new bonds don't reliably form.
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