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← ScienceWhich outcome occurs when exceeding the decomposition temperature of PMMA?
A)Chain scission shortens polymer chains✓
B)Increased crystallinity raises melting point
C)Crosslinking enhances mechanical properties
D)Plasticizers lower glass transition temperature
💡 Explanation
Exceeding PMMA's decomposition temperature causes chain scission because thermal energy breaks covalent bonds within the polymer chains, therefore shorter chains result, rather than increased crystallinity or crosslinking which require different reactions and forming new bonds.
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