scholarly journals Structure of entangled polymer network from primitive chain network simulations

2010 ◽  
Vol 132 (13) ◽  
pp. 134902 ◽  
Author(s):  
Yuichi Masubuchi ◽  
Takashi Uneyama ◽  
Hiroshi Watanabe ◽  
Giovanni Ianniruberto ◽  
Francesco Greco ◽  
...  
Keyword(s):  
Polymer Network ◽  
Network Simulations ◽  
Entangled Polymer

Erratum: “Highly entangled polymer primitive chain network simulations based on dynamic tube dilation” [J. Chem. Phys. 121, 12650 (2004)]

2005 ◽  
Vol 122 (20) ◽  
pp. 209902
Author(s):  
Takatoshi Yaoita ◽  
Takeharu Isaki ◽  
Yuichi Masubuchi ◽  
Hiroshi Watanabe ◽  
Giovanni Ianniruberto ◽  
...  
Keyword(s):  
Chem Phys ◽  
Network Simulations ◽  
Entangled Polymer

scholarly journals Highly entangled polymer primitive chain network simulations based on dynamic tube dilation

2004 ◽  
Vol 121 (24) ◽  
pp. 12650 ◽  
Author(s):  
Takatoshi Yaoita ◽  
Takeharu Isaki ◽  
Yuichi Masubuchi ◽  
Hiroshi Watanabe ◽  
Giovanni Ianniruberto ◽  
...  
Keyword(s):  
Network Simulations ◽  
Entangled Polymer

Entangled polymer orientation and stretch under large step shear deformations in primitive chain network simulations

2008 ◽  
Vol 47 (5-6) ◽  
pp. 591-599 ◽  
Author(s):  
Kenji Furuichi ◽  
Chisato Nonomura ◽  
Yuichi Masubuchi ◽  
Hiroshi Watanabe ◽  
Giovanni Ianniruberto ◽  
...  
Keyword(s):  
Shear Deformations ◽  
Large Step ◽  
Network Simulations ◽  
Entangled Polymer

Controlling Toughness of Polymer-grafted Nanoparticle Composites for Impact Mitigation

Soft Matter ◽  
2022 ◽  
Author(s):  
Shawn H. Chen ◽  
Amanda J. Souna ◽  
Stephan Jeffrey Stranick ◽  
Mayank Jhalaria ◽  
Sanat Kumar ◽  
...  
Keyword(s):  
Unit Volume ◽  
Polymer Network ◽  
New Paradigm ◽  
Load Bearing ◽  
Topological Constraints ◽  
Impact Mitigation ◽  
Entangled Polymer ◽  
Grafted Nanoparticle ◽  
Nanoparticle Composites

Toughness in an entangled polymer network is typically controlled by the number of load-bearing topological constraints per unit volume. In this work, we demonstrate a new paradigm for controlling toughness...

Probing the relationship between the scales of space and time in an entangled polymer network with an oscillating nanotip

2003 ◽  
Vol 15 (36) ◽  
pp. 6167-6177 ◽  
Author(s):  
F Dubourg ◽  
J P Aim ◽  
S Marsaudon ◽  
G Couturier ◽  
R Boisgard
Keyword(s):  
Polymer Network ◽  
Space And Time ◽  
Entangled Polymer ◽  
The Relationship

Lubricity from Entangled Polymer Networks on Hydrogels

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Angela A. Pitenis ◽  
Juan Manuel Urueña ◽  
Ryan M. Nixon ◽  
Tapomoy Bhattacharjee ◽  
Brandon A. Krick ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Polymer Network ◽  
Polymer Networks ◽  
Mesh Size ◽  
Solution Polymerization ◽  
Hydrogel Sample ◽  
Low Friction ◽  
Aqueous Environments ◽  
Surface Measurements ◽  
Entangled Polymer

Structural hydrogel materials are being considered and investigated for a wide variety of biotribological applications. Unfortunately, most of the mechanical strength and rigidity of these materials comes from high polymer concentrations and correspondingly low polymer mesh size, which results in high friction coefficients in aqueous environments. Recent measurements have revealed that soft, flexible, and large mesh size hydrogels can provide ultra low friction, but this comes at the expense of mechanical strength. In this paper, we have prepared a low friction structural hydrogel sample of polyhydroxyethylmethacrylate (pHEMA) by polymerizing an entangled polymer network on the surface through a solution polymerization route. The entangled polymer network was made entirely from uncrosslinked polyacrylamide (pAAm) that was polymerized from an aqueous solution and had integral entanglement with the pHEMA surface. Measurements revealed that these entangled polymer networks could extend up to ∼200 μm from the surface, and these entangled polymer networks can provide reductions in friction coefficient of almost two orders of magnitude (μ > 0.7 to μ < 0.01).

Freeze-etch TEM of aqueous polymer gel network morphology

1986 ◽  
Vol 44 ◽  
pp. 796-797
Author(s):  
J. A. N. Zasadzinski ◽  
R. K. Prud'homme
Keyword(s):  
Metal Ion ◽  
Polymer Network ◽  
Polymer Gels ◽  
Polymer Gel ◽  
Deformation History ◽  
Crosslinked Polymer ◽  
Aqueous Polymer ◽  
History Of ◽  
Gel Network ◽  
Network Morphology

The rheological and mechanical properties of crosslinked polymer gels arise from the structure of the gel network. In turn, the structure of the gel network results from: thermodynamically determined interactions between the polymer chain segments, the interactions of the crosslinking metal ion with the polymer, and the deformation history of the network. Interpretations of mechanical and rheological measurements on polymer gels invariably begin with a conceptual model of,the microstructure of the gel network derived from polymer kinetic theory. In the present work, we use freeze-etch replication TEM to image the polymer network morphology of titanium crosslinked hydroxypropyl guars in an attempt to directly relate macroscopic phenomena with network structure.

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.

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