The packing of granular polymer chains
Original entry: Sujit S. Datta, APPHY 225, Fall 2009.
L. N. Zhou, X. Cheng, M. L. Rivers, H. M. Jaeger and S. R. Nagel, Science 326, 408 (2009).
- Random packings of spheres (jammed) are rigid and resistant to shear
- How do flexible granular chains jam?
- Find: as chain length increases, density and coordination number decreases -- but, still jammed
- Long floppy chains partition into groups of small loops (which have more rigidity) that then jam
- Strengthens possible connection between jamming of granular materials and polymeric glass transition: similar dependence on chain length, topology, stiffness