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← ScienceWhich outcome results when tensile stress overcomes hydrogen bonding in polymers?
A)Covalent cross-linking increases
B)Increased brittle fracture risk✓
C)Molecular weight increases sharply
D)Decreased glass transition temperature
💡 Explanation
Increased brittle fracture risk results when stress overcomes hydrogen bonding, because chain slippage is facilitated by hydrogen bond disruption. Therefore brittle failure occurs, rather than ductile deformation dependent upon covalent bond deformation.
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