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What keeps stretched rubber from simply flowing away?
A connected polymer network gives a useful starting point for explaining a rubbery solid.
Sources for this view
Polymer chains have covalently bonded backbones. In sulfur-vulcanized rubber, chemical bridges connect chains and limit persistent flow. Entanglement also constrains motion but is a different structural feature from a covalent bridge.
Sources for this view
Explore the model (optional)
EXPLORE THE MODEL
Connectivity without a property shortcut
Inspect the structure; select a site or component for its label.
What this representation means
Markers are chain segments, not atoms. Authored crosslinks illustrate connectivity, not a specific epoxy formulation, conversion, bond chemistry or quantitative stiffness.
- Coarse inventory
- 4 chains × 16 segment markers
- Interchain links
- 0
- Chemical detail
- Segment markers do not encode atomic composition
Change the link count, then separate the unconnected chain groups. Distributed links connect all four chains from three links onward. Concentrating all six links between two chains leaves two chains separate. Equal link counts can produce different connectivity. This does not make a real connected polymer rigid: networks can deform. Chemistry, temperature, chain length and defects also matter.
What this model can establish
Markers are chain segments, not atoms. Authored crosslinks illustrate connectivity, not a specific epoxy formulation, conversion, bond chemistry or quantitative stiffness.
Optional: check your understanding
MAKE THE CONNECTION
Which distinction matters in the network drawing?