Which risk increases when a polymer's hydrogen bonds weaken at elevated temperatures in composite material?

💡 Explanation

When hydrogen bonds weaken within the polymer matrix of a composite at elevated temperatures, reduced polymer interchain adhesion via van der Waals forces occurs because the thermal energy disrupts electrostatic attractions, diminishing the transfer of load across interface. Therefore delamination risk increases, rather than tensile strength, controlled expansion, or increased resistance, which depend on stronger bonds.

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