Broken rubber band ends do not rejoin when held together due to lack of polymer chain entanglement and chemical bonding
the verdict
SUPPORTED
the evidence backs this
confidence 86/100
Broken rubber band ends fail to rejoin spontaneously because standard elastomers lack the necessary free polymer chain mobility, dynamic bonding, and interfacial entanglements to bridge the severed gap.
Evidence for · 3
Molecular weight dependence of healing and brittle fracture in amorphous polymers above the entanglement molecular weight
1985 · cited by 45
This study demonstrates that polymer healing and fracture mechanics depend directly on chain entanglements and molecular weight.
See more details
More for · 2
From bonds to breaks: multiscale perspectives on polymer network fracture
2025 · cited by 14
This review highlights how polymer network architecture, including chain entanglement and bonding, dictates fracture and healing behavior.
The origin of chain entanglement: Correlations between entanglement and chain structure
1993 · cited by 14
This research explains how chain entanglements rely on binary hooking contacts between polymer chains to govern mechanical properties.