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- W4362541211 abstract "Understanding the nonlinear dynamics of an unentangled polymer melt from the bead-spring chain model requires knowledge of the variation of spring stiffness, monomeric friction, and Brownian intensity. In this work, these nonequilibrium (NE) parameters are quantified in the model simulation systems of unentangled melt under steady-flow conditions. We focus on a particular version of the model with undefined NE parameters. Some expressions to relate the NE parameters with the rheological and structural properties are pointed out. The spring stiffening parameter rκ is proven to be easily accessible in the planar flows. The distribution of the stiffening effect along the polymer contour is identified. The alignment-induced reduction of monomeric friction is confirmed in the simulation systems, but the anisotropic feature of friction is also emphasized. The constraint on the cooperative variation of spring stiffness and friction is proven to be an important property of extensional flow. The variation of Brownian intensity is found to be decoupled with the variation of friction, which means the violation of the fluctuation–dissipation (FD) theorem. The NE parameters of the simulation systems are further compared with those from the experimental systems." @default.
- W4362541211 created "2023-04-06" @default.
- W4362541211 creator A5054679591 @default.
- W4362541211 creator A5076332309 @default.
- W4362541211 date "2023-04-04" @default.
- W4362541211 modified "2023-09-24" @default.
- W4362541211 title "Variation of Spring Stiffness, Monomeric Friction, and Brownian Intensity in the Simulation System of Unentangled Melt under Steady Flow" @default.
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- W4362541211 doi "https://doi.org/10.1021/acs.macromol.2c02458" @default.
- W4362541211 hasPublicationYear "2023" @default.
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