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← ScienceWhich risk increases to a material during molecular 3D printing which deposits heated polymer layers beyond their thermal stability limit?
A)Increased monomer backbiting reaction rate✓
B)Decompression shockwave propagation through structure
C)Increased crystalline domain formation rate
D)Volumetric thermal expansion destabilization occurs
💡 Explanation
Increased monomer backbiting can occur because exceeding the polymer's thermal stability limit promotes chain scission and depolymerization via a backbiting mechanism. Therefore, structural integrity is threatened, rather than just expansion or crystallization. Backbiting removes monomers from a growing chain.
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