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Comparison among multi-chain models for entangled polymer dynamics


Although lots of coarse-grained models have been proposed to trace long time behaviors of entangled polymers, compatibility among the different models has not been frequently discussed. In this study, some dynamical and static quantities, such as diffusion, relaxation modulus, chain dimension, and entanglement density were examined for the multi-chain slip-link model (primitive chain network model) and the multi-chain slip-spring model, and the results were compared with those reported for the standard bead-spring model. For the diffusion, three models are compatible with scale-conversion parameters for units of length, time and, bead (segment) number (or the molecular weight). The relaxation modulus is also compatible given that the model dependence is accommodated for the entanglement density and the additional scale-conversion for the unit of modulus. The chain dimension is in reasonable coincidence with small deviations due to the weak non-Gaussianity for the models. Apart from these plausible compatibility, significant discrepancy has been found for the inter-chain cross-correlations in the relaxation modulus.

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Publication details

The article was received on 09 May 2018, accepted on 05 Jun 2018 and first published on 06 Jun 2018

Article type: Paper
DOI: 10.1039/C8SM00948A
Citation: Soft Matter, 2018, Accepted Manuscript
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    Comparison among multi-chain models for entangled polymer dynamics

    Y. Masubuchi and T. Uneyama, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM00948A

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