| A certain `critical' molecular weight controls rheological properties of the multibead finitely extensible nonlinear elastic (FENE) chain model polymer melt. The rheological crossover manifests itself in a change of power law behavior for the viscous properties at a critical number of beads per chain Nc=100 +/- 10. This finding confirms a newly proposed relationship between dimensionless critical weight, characteristic length and flexibility which we obtain as a side-result. Results further suggest, that the entanglement molecular weight Ne for the flexible FENE chain model could be comparable in size or even larger than its critical molecular weight Nc.
for LaTeX users @article{MKroger2000-85,
author = {M. Kr\"oger and S. Hess},
title = {Rheological evidence for a dynamical crossover in polymer melts via nonequilibrium molecular dynamics},
journal = {Phys. Rev. Lett.},
volume = {85},
pages = {1128-1131},
year = {2000}
}
\bibitem{MKroger2000-85} M. Kr\"oger, S. Hess,
Rheological evidence for a dynamical crossover in polymer melts via nonequilibrium molecular dynamics,
Phys. Rev. Lett. {\bf 85} (2000) 1128-1131.MKroger2000-85
M. Kr\"oger, S. Hess
Rheological evidence for a dynamical crossover in polymer melts via nonequilibrium molecular dynamics
Phys. Rev. Lett.,85,2000,1128-1131 |
mk@mat.ethz.ch
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