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← ScienceWhich outcome occurs when annealing a polymer containing numerous hydrogen bonds?
A)Increased crystallinity from chain alignment✓
B)Decreased tensile strength from chain scission
C)Lower glass transition via cross-linking
D)Enhanced thermal conductivity from vibrational modes
💡 Explanation
When annealing a polymer, increased thermal energy allows polymer chains to overcome energy barriers, and hydrogen bonds facilitate chain alignment, increasing crystallinity because of their directionality. Therefore greater crystallinity results, rather than decreased strength/glass transition which require chain disruption.
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