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Which consequence results when localized heating overwhelms intramolecular forces within a polymer?

A)Chain scission reduces molecular weight
B)Crystallinity increases within amorphous regions
C)Glass transition temperature shifts higher
D)Entanglement density remains largely unaffected

💡 Explanation

Chain scission occurs because thermal energy overcomes bond energies causing the polymer chains to break during thermal degradation, therefore the molecular weight decreases, rather than the polymer remaining intact due to strong secondary bonds that are unaffected.

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