Which outcome occurs when poly-ethylene-terephthalate bottles are exposed to prolonged high temperature?

💡 Explanation

When PET bottles are heated, hydrolytic chain scission degrades the polymer because water molecules break the ester bonds, reducing the average molecular weight and mechanical strength. Therefore chain scission and strength reduction is the consequence, rather than increased crystallinity, cross-linking, or enhanced transparency which are driven by different exposure conditions.

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