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← ScienceWhich outcome results when applying excessive shear force to epoxy adhesives?
A)Chain scission leads to degradation✓
B)Increased crosslinking increases rigidity
C)Van der Waals forces resist separation
D)Hydrogen bonding strengthens polymer matrix
💡 Explanation
Chain scission causes degradation because mechanical stress severs the covalent bonds within the epoxy polymer chains, therefore reducing the adhesive's strength, rather than increasing crosslinking or relying on weaker intermolecular forces.
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