The deformation and orientation of chain molecules in a polymer solution or a polymer melt can be detected via the flow birefringence or by light or neutron scattering experiments which yield the radius of gyration tensor. The corresponding information can be inferred from nonequilibrium molecular dynamics (NEMD) computer simulations of polymer solutions [1] and melts [2,3] for model systems. In the simulations, the dynamics of the rotation of molecules can be analyzed in detail. This information is practically not accessible in experiments but is of importance for understanding the microscopic processes in sheared polymeric liquids.
[1] C. Aust, M. Kröger, and S. Hess, Macromolecules 32 (1999) 5660-5672.
[2] M. Kröger, W. Loose, and S. Hess, J. Rheol. 37 (1993) 1057-1080.
|
 by bike, and we can drink coffee and chat with you about education issues! We further care about science and serious work here.</small>&level=0&sublevel=3){kind=link}