Which mechanism limits the strength of covalent bonds in polymer fibers under tension?

💡 Explanation

When polymer fibers are under tension, bond strength is limited by valence bonding, where hybridization mismatch in molecular orbitals leads to weaker bonds more susceptible to breakage. Therefore orbital mismatch leads to failure, rather than van der Waals repulsion, chain slippage, or charge accumulation that affect bulk properties differently.

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