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← ScienceWhat outcome arises from excess thermal energy reaching a polymer?
A)Chain scission reduces molecular weight✓
B)Exothermic cross-linking increases rigidity
C)Increased crystallization boosts tensile strength
D)Decreased crystallinity increases impact resistance
💡 Explanation
Chain scission, a degradative chain reaction pathway, occurs, because high temperatures break bonds; therefore the molecular weight significantly decreases, rather than cross-linking which would require specific chemical activation and produce a higher molecular weight.
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