Which outcome results when a polymer composite material is subjected to sustained tensile stress in a humid environment?

💡 Explanation

When a polymer composite experiences tensile stress and humidity, hydrolysis weakens the polymer matrix by breaking ester bonds, accelerating creep, where time-dependent deformation at constant stress culminates in rupture. Therefore creep rupture is accelerated via hydrolysis, rather than increased stiffness, reduced thermal expansion, or improved fatigue resistance, which depend on distinct strengthening mechanisms.

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