Which mechanism leads to thermoset polymers retaining their shape when heated after initial curing?

A)Chain entanglement inhibits molecular motion

B)Covalent cross-linking prevents chain sliding✓

C)Hydrogen bonding increases glass transition

D)Van der Waals forces maintain microstructure

💡 Explanation

When heated, only small deflection result in heavily crosslinked thermosets because covalent crosslinking forms permanent chemical bonds between polymer chains, preventing them from sliding past each other during heating. Therefore shape retention results, rather than softening, which requires weaker intermolecular forces.

🏆 Up to £1,000 monthly prize pool

Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.

⚡ Enter Arena

Which mechanism leads to thermoset polymers retaining their shape when heated after initial curing?

💡 Explanation

Related Questions