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← ScienceWhich outcome occurs when an adhesive's hydrogen bonds are disrupted by elevated temperatures?
A)Decreased shear strength in joint✓
B)Increased surface tension of film
C)Enhanced electrical conductivity via delocalization
D)Accelerated oxidative cross-linking
💡 Explanation
When adhesive's hydrogen bonds are exposed to high temperatures, the hydrogen bonds between polymer chains weaken because increased thermal energy overcomes the intermolecular forces leading to reduce cohesion and thus decreases the shear strength. Therefore decreased shear strength occurs, rather than surface tension increase, conductivity improvement or oxidative cross-linking which depend upon alternative molecular behavior.
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