Difference between revisions of "The packing of granular polymer chains"

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(New page: Original entry: Sujit S. Datta, APPHY 225, Fall 2009. == Reference == L. N. Zhou, X. Cheng, M. L. Rivers, H. M. Jaeger and S. R. Nagel, ''Science'' '''326,''' 408 (2009). == Keywords...)
 
(Key Points)
Line 14: Line 14:
  
 
- Random packings of spheres (jammed) are rigid and resistant to shear
 
- Random packings of spheres (jammed) are rigid and resistant to shear
 +
 
- How do flexible granular chains jam?
 
- How do flexible granular chains jam?
 +
 
- Find: as chain length increases, density and coordination number decreases -- but, still jammed
 
- 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
 
- 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
 
- Strengthens possible connection between jamming of granular materials and polymeric glass transition: similar dependence on chain length, topology, stiffness
 +
 
-
 
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Revision as of 20:32, 24 October 2009

Original entry: Sujit S. Datta, APPHY 225, Fall 2009.

Reference

L. N. Zhou, X. Cheng, M. L. Rivers, H. M. Jaeger and S. R. Nagel, Science 326, 408 (2009).

Keywords

granular, polymer, packing, glass transition, jamming

Key Points

(In progress)

- 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

-