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← ScienceWhich outcome reduces polyethylene tensile strength when exposed to high temperatures?
A)Increased chain slippage between polymer strands✓
B)Enhanced cross-linking among polymer chains
C)Reduced crystallinity from polymer chain ordering
D)Oxidative degradation of chain-end capping groups
💡 Explanation
When exposed to high temperatures, increased chain mobility occurs because thermal energy overcomes intermolecular forces, leading to greater slippage between polymer strands. Therefore tensile strength is reduced, rather than enhanced crosslinking, crystallinity, or chain-end degradation which have different activation energies.
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