Scaling Laws for the Conformation and Viscosity of
Ring Polymers in the Crossover Region around Me from Detailed Molecular Dynamics Simulations
Version 2 2018-07-13, 18:24
Version 1 2018-07-13, 18:19
Posted on 2018-07-13 - 18:24
We present results
from detailed, atomistic molecular dynamics
(MD) simulations of pure, strictly monodisperse linear and ring poly(ethylene
oxide) (PEO) melts under equilibrium and nonequilibrium (shear flow)
conditions. The systems examined span the regime of molecular weights
(Mw) from sub-Rouse (Mw < Me) to reptation (Mw ∼ 10 Me), where Me denotes the characteristic
entanglement molecular weight of linear PEO. For both PEO architectures
(ring and linear), the predicted chain center-of-mass self-diffusion
coefficients DG as a function of PEO Mw are in remarkable agreement with experimental
data. From the flow simulations under shear, we have extracted and
analyzed the zero-shear viscosity of ring and linear PEO melts as
a function of Mw.
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Tsalikis, Dimitrios
G.; Alatas, Panagiotis V.; Peristeras, Loukas D.; Mavrantzas, Vlasis G. (2018). Scaling Laws for the Conformation and Viscosity of
Ring Polymers in the Crossover Region around Me from Detailed Molecular Dynamics Simulations. ACS Publications. Collection. https://doi.org/10.1021/acsmacrolett.8b00437
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AUTHORS (4)
DT
Dimitrios
G. Tsalikis
PA
Panagiotis V. Alatas
LP
Loukas D. Peristeras
VM
Vlasis G. Mavrantzas