Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
1999-06-14
Physics
Condensed Matter
Soft Condensed Matter
5 pages, 4 figures, RevTex
Scientific paper
10.1209/epl/i2000-00212-8
We present results of molecular dynamics simulations of very long model polymer chains analyzed by various experimentally relevant techniques. The segment motion of the chains is found to be in very good agreement with the repatation model. We also calculated the plateau-modulus G_N. The predicitions of the entanglement length N_e from G_N and from the mean square displacements of the chains segments disagree by a factor of about 2.2(2), indicating an error in the prefactor in the standard formula for G_N. We show that recent neutron spin echo measurements were carried out for chain lengths which are too small for a correct determination of N_e.
Grest Gary S.
Kremer Kurt
Puetz Mathias
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