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Which outcome follows increased thermal stress aging polymer seals?

A)Decreasing long-term compression set
B)Increased critical elastomer crosslinking
C)Glass transition temperature decreases
D)Increased steady-state diffusion constant

💡 Explanation

Above rated temps, chain mobility increases, and the permeation rate rises sharply because diffusion constant increases exponentially within a limited range. Therefore permeation and degradation accelerate, rather than the crosslinking effect, due to free volume increases in the matrix.

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