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← ScienceWhich consequence results when a photochemical reaction causes molecular dissociation in polyvinyl chloride (PVC)?
A)Chain scission degrades the polymer✓
B)Increased crosslinking enhances stability
C)Crystallinity improves density evenly
D)Increased flexibility reduces yield strength
💡 Explanation
Molecular dissociation in PVC breaks the polymer chains during photodegradation because photons initiate radical reactions, causing chain scission; therefore, the material degrades rather than crosslinks causing brittleness under higher solar radiation.
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