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Kramers relaxation times $\tau_{K}$ and relaxation times $\tau_{R}$ and$\tau_{G}$ for the end-to-end distances and for center of mass diffusion arecalculated for dense systems of athermal lattice chains. $\tau_{K}$ is definedfrom the response of the radius of gyration to a Kramers potential whichapproximately describes the effect of a stationary shear flow. It is shown thatwithin an intermediate range of chain lengths N the relaxation times $\tau_{R}$and $\tau_{K}$ exhibit the same scaling with N, suggesting that N-dependentmelt-viscosities for non-entangled chains can be obtained from the Kramersequilibrium concept.Comment: submitted to: Journal of Chemical Physic

Melt viscosities of lattice polymers using a Kramers potential treatment