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← ScienceWhich consequence results when excessive heat during vulcanization?
A)Chain scission decreases tensile strength✓
B)Cross-linking increases elasticity limits
C)Grafting enhances thermal degradation
D)Curing reduces network chain flexibility
💡 Explanation
Chain scission leads to degradation of the polymer network because thermal energy overcomes the covalent bond strength, therefore tensile strength decreases rather than elasticity increasing, because covalent breaking is the mechanism.
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