Molecular dynamics simulation of a flexible polymer network in a liquid crystalline solvent; dynamical properties

Polymer ◽  
2004 ◽  
Vol 45 (26) ◽  
pp. 8901-8911 ◽  
Author(s):  
Anatoly A. Darinskii ◽  
Anna Zarembo ◽  
Nikolai K. Balabaev ◽  
Igor M. Neelov ◽  
Franciska Sundholm
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Liquid Crystalline ◽  
Polymer Network ◽  
Dynamics Simulation ◽  
Flexible Polymer ◽  
Dynamical Properties

Molecular dynamics simulation of a flexible polymer network in a liquid crystal solvent; structure and equilibrium properties

Polymer ◽  
2004 ◽  
Vol 45 (14) ◽  
pp. 4857-4866 ◽  
Author(s):  
Anatoly A. Darinskii ◽  
Anna Zarembo ◽  
Nikolai K. Balabaev ◽  
Igor M. Neelov ◽  
Franciska Sundholm
Keyword(s):  
Molecular Dynamics ◽  
Liquid Crystal ◽  
Molecular Dynamics Simulation ◽  
Polymer Network ◽  
Dynamics Simulation ◽  
Solvent Structure ◽  
Flexible Polymer

Investigation of the Microscopic Viscoelastic Property for Cross-linked Polymer Network by Molecular Dynamics Simulation

2011 ◽  
Vol 39 (1) ◽  
pp. 44-58 ◽  
Author(s):  
Y. Masumoto ◽  
Y. Iida
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Analytical Method ◽  
Viscoelastic Properties ◽  
Polymer Network ◽  
Dynamics Simulation ◽  
Coarse Grained ◽  
The Cross ◽  
Microscopic Dynamic ◽  
Coarse Grained Molecular Dynamics

Abstract The purpose of this work is to develop a new analytical method for simulating the microscopic mechanical property of the cross-linked polymer system using the coarse-grained molecular dynamics simulation. This new analytical method will be utilized for the molecular designing of the tire rubber compound to improve the tire performances such as rolling resistance and wet traction. First, we evaluate the microscopic dynamic viscoelastic properties of the cross-linked polymer using coarse-grained molecular dynamics simulation. This simulation has been conducted by the coarse-grained molecular dynamics program in the OCTA) (http://octa.jp/). To simplify the problem, we employ the bead-spring model, in which a sequence of beads connected by springs denotes a polymer chain. The linear polymer chains that are cross-linked by the cross-linking agents express the three-dimensional cross-linked polymer network. In order to obtain the microscopic dynamic viscoelastic properties, oscillatory deformation is applied to the simulation cell. By applying the time-temperature reduction law to this simulation result, we can evaluate the dynamic viscoelastic properties in the wide deformational frequency range including the rubbery state. Then, the stress is separated into the nonbonding stress and the bonding stress. We confirm that the contribution of the nonbonding stress is larger at lower temperatures. On the other hand, the contribution of the bonding stress is larger at higher temperatures. Finally, analyzing a change of microscopic structure in dynamic oscillatory deformation, we determine that the temperature/frequency dependence of bond stress response to a dynamic oscillatory deformation depends on the temperature dependence of the average bond length in the equilibrium structure and the temperature/frequency dependence of bond orientation. We show that our simulation is a useful tool for studying the microscopic properties of a cross-linked polymer.

Molecular dynamics simulation of geminal dicationic ionic liquids [Cn(mim)2][NTf2]2 – structural and dynamical properties

2018 ◽  
Vol 20 (1) ◽  
pp. 435-448 ◽  
Author(s):  
Majid Moosavi ◽  
Fatemeh Khashei ◽  
Elaheh Sedghamiz
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Molecular Dynamics Simulation ◽  
Liquid Phase ◽  
Molecular Basis ◽  
Dynamics Simulation ◽  
Bulk Liquid ◽  
Fundamental Understanding ◽  
Dicationic Ionic Liquids ◽  
Dynamical Properties

The structural and dynamical properties of two dicationic ionic liquids, i.e. [Cn(mim)2][NTf2]2 with n = 3 and 5, have been studied to obtain a fundamental understanding of the molecular basis of the macroscopic and microscopic properties of the bulk liquid phase.

Solvation of cholesterol in different solvents: a molecular dynamics simulation study

2020 ◽  
Vol 22 (3) ◽  
pp. 1154-1167 ◽  
Author(s):  
Khair Bux ◽  
Syed Tarique Moin
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Molecular Dynamics Simulations ◽  
Dimethyl Sulfoxide ◽  
Simulation Study ◽  
Dynamics Simulation ◽  
Dynamical Properties ◽  
Dynamics Simulations

Molecular dynamics simulations were applied to an isolated cholesterol immersed in four different solvents of varying polarity, such as water, methanol, dimethyl sulfoxide and benzene, to gain insights into the structural and dynamical properties.

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