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← ScienceWhich consequence results when the molecular geometry limits orbital overlap in silicon-based polymers?
A)Reduced polymer chain flexibility
B)Increased thermal decomposition rate✓
C)Enhanced chemical reaction selectivity
D)Elevated material refractive index
💡 Explanation
A poor molecular geometry limits orbital overlap, causing decreased bond strength. Specifically, decreased bond strength leads to faster thermal decomposition due to requiring less energy for bond breakage, therefore accelerating polymer degradation, rather than enhancing stability under thermal stress.
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