Which outcome primarily limits the tensile strength of a polymer composite under extreme stretching?

💡 Explanation

When a polymer composite is stretched extremely, covalent bond scission within the polymer chains occurs as the primary mechanism due to their high strength but limited extensibility, leading to material failure. Therefore, covalent bond scission is the main limiting factor, rather than effects related to hydrogen, Van der Waals, or ionic links that involve weaker forces.

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