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← ScienceWhich outcome arises when elevated temperature weakens van der Waals forces between polymer chains in a composite material?
A)Decreased tensile strength and stiffness✓
B)Increased glass transition temperature
C)Enhanced resistance to chemical corrosion
D)Greater resistance to UV degradation
💡 Explanation
When elevated temperature weakens van der Waals forces, polymer chain mobility increases because thermal energy overcomes intermolecular attractions, leading to a reduction in the material's resistance to deformation. Therefore decreased tensile strength results, rather than other effects that would depend on different degradation mechanisms or polymer properties.
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