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Chain contraction and nonlinear stress damping in primitive chain network simulations
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View: Figures


Image of FIG. 1.
FIG. 1.

Comparison of simulation results and the experimental data for PS solution (Ref. 3). (a) Relaxation modulus for various strains; (b) test of time-strain separability. Symbols and solid curves indicate simulations and experimental data, respectively.

Image of FIG. 2.
FIG. 2.

Damping function obtained from the simulation (filled circle), experiments (open square) (Ref. 3), the three-chain theory (Refs. 14 and 19) (solid curve), and the DE theory without independent alignment approximation (Ref. 2) (dashed curve).

Image of FIG. 3.
FIG. 3.

Time-dependent damping functions obtained from simulations and the experiments (Ref. 3). Dashed lines shows the behavior deduced from Eq. (7). Arrows indicate the unit time , Rouse time and the longest relaxation time defined in Eq. (7).

Image of FIG. 4.
FIG. 4.

Relaxation of (a) contour length of the chain, (b) subchain length, and (c) subchain stretch defined with respect to the quasiequilibrium reference (based on the monomer number in the subchain at respective times). Dashed lines indicate the prediction of DE theory (see Appendix).

Image of FIG. 5.
FIG. 5.

Chain length dependence of the relaxation time extracted from the subchain length relaxation function. For comparison, the characteristic time of the slow mode defined for the time-dependent damping function and the terminal relaxation time in the linear viscoelastic regime are also shown.

Image of FIG. 6.
FIG. 6.

Time-evolution of the sliplink number under step strain: Average total sliplink number per chain for various strain (part a) and curvilinear sliplink density at for (part b) and (part c). Arrows in parts (b) and (c) indicate the direction of time evolution.

Image of FIG. 7.
FIG. 7.

Curvilinear distribution of normalized subchain tension under step strain obtained from (a) simulation in this study and (b) DE model. Part (c) shows a ratio of the stress obtained from the simulation to that deduced from the DE model.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Chain contraction and nonlinear stress damping in primitive chain network simulations