Stochastic Simulation of a Full-Chain Reptation Model with Constraint Release, Chain-Length Fluctuations and Chain Stretching

Jesper Neergaard, Jay D. Schieber

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


A self-consistent reptation model that includes chain stretching, chain-length fluctuations, segment connectivity and constraint release is used to predict transient and steady flows. Quantitative comparisons are made with entangledsolution data. The model is able to capture quantitatively all features of experimental shear data considered, including overshoot in both shear and first normal stresses, the strain-rate dependence of the strain magnitude at maximum stress, the steady-state viscosity and first-normal-stress coefficient as functions of shear rate, the viscosity curves for differentmolecular weight, the transient and steady-state behavior of the extinction angle, and the stress relaxation in cessation of steady shear flow.
Original languageEnglish
Title of host publicationThe Society of Rheology 71st. Annual Meeting Abstract Book
Number of pages43
Publication date1999
Publication statusPublished - 1999
Event71st. Annual Meeting of The Society of Rheology - Madison,WI, United States
Duration: 17 Oct 199921 Oct 1999
Conference number: 71


Conference71st. Annual Meeting of The Society of Rheology
Country/TerritoryUnited States

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