1 edition of Flexible Polymer Chains in Elongational Flow found in the catalog.
|Statement||edited by Tuan Quoc Nguyen, Hans-Henning Kausch|
|The Physical Object|
|Format||[electronic resource] :|
|Pagination||1 online resource (xvii, 398 p.)|
|Number of Pages||398|
|ISBN 10||3642635156, 3642582524|
|ISBN 10||9783642635151, 9783642582523|
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Flexible Polymer Chains in Elongational Flow Theory and Experiment. Editors: Nguyen, Tuan Q., Kausch, Hans-Henning (Eds.) Free Preview. Buy this book eBook ,39 € price for Spain (gross) Buy eBook ISBN ; Digitally watermarked, DRM-free.
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The behavior of polymer solutions in simple shear flows has been the subject of. Flexible polymer chains in elongational flow: theory and experiment. [Q Tuan Nguyen; H H Kausch;] Elongational flow with an inherent low vorticity is known to be more effective in extending polymer chains than simple shear flow and thus is more interesting from the point of view of basic.
Get this from a library. Flexible Polymer Chains in Elongational Flow: Theory and Experiment. [Tuan Quoc Nguyen; H H Kausch] -- Flexible Polymer Chain Dynamics in Elongational Flow fulfills a need by presenting the most important advances in the field of flexible polymer chains in "strong" flow in a single literature source.
The shish (skewer) is formed first as chains align with the extensional flow. The transition from random coil to the stretched conformation is discontinuous and apparently first-order . While in general longer chains are more likely to be aligned, there is a strong dependence on the initial conformation of the chains and entanglements.
Buy Flexible Polymer Chains in Elongational Flow: Theory and Experiment Softcover reprint of the original 1st ed. by Nguyen, Tuan Q. (ISBN: ) Flexible Polymer Chains in Elongational Flow book Amazon's Book Store.
Everyday low prices and free delivery on eligible : Paperback. Shear-Free or Elongational Flow And Viscosity. The elongational flow properties of polymers are of great importance in polymer resin processing such as film blowing and fiber spinning and are essential in the design of processing equipment, process optimization, and troubleshooting.
In analogy to the shear rate, the elongational flow rate is. Elongational flow with an inherent low vorticity is known to be more effective in extending polymer chains than simple shear flow and thus is more interesting from the point of view of basic (molecular chain dynamics at high deformation) and applied polymer science (rheology, fiber extrusion, drag reduction, flow through porous media).Book Edition: Softcover Reprint of The Original 1st Ed.
Flexible Polymer Chains in Elongational Flow: Theory and The behavior of polymer solutions in simple shear flows has been the subject of considerable research in the past. On the other hand, reports on polymers in elongational flow have appeared comparatively recently in the literature.
Polymer Dynamics, Rheology, and Flow. Go to: Polymers / DNA / Lipids, Peptides & Surfactants / Microfluidics and Devices / Books and Book Chapters / Top of page M.
Mohammadi, A. Salehi, R.J. Branch, L.J Cygan, C.G. Besirli, and R.G. Larson, ChemPhysChem “Growth Kinetics in Layer-by-Layer Assemblies of Organic Nanoparticles and Polyelectrolytes.”. Discover Book Depository's huge selection of Tuan Q Nguyen books online.
Free delivery worldwide on over 20 million titles. Elongational flow with an inherent low vorticity is known to be more effective in extending polymer chains than simple shear flow and thus is more interesting from the point of view of basic (molecular chain dynamics at high deformation) and applied polymer science (rheology, fiber extrusion, drag reduction, flow through porous media).
Namely, 1) the first-order “coil-to-stretch” transition of flexible linear polymer chains under elongational flow; 2) how the chain topology and parameter, as well as the pore structure affect the ultrafiltration behavior of polymer by: 3.
The dynamics of isolated high molecular weight (MH) polymer chains dissolved in a nonentangled semidilute solution of a low molecular weight (ML) polymer were investigated by monitoring the elongational flow birefringence. Because of its nonentangled nature, a low molecular weight matrix polymer solution is regarded as a pure solvent (a binary pseudo-solvent).Cited by: 2.
Book Chapter. DOI: /_ “ Single Polymers in Elongational Flows: dynamic, steady-state, and population averaged properties ”, in Flexible Polymer Chains in Elongational Flow: Theories and Experiments (Springer-Verlag)Book Chapter.
Hydrodynamics of DNA Molecule in a Flow Field. Elongational flow studies on flexible polymer chains in a pseudo-solvent Article in Colloid and Polymer Science (7) April with 10 Reads How we measure 'reads'.
MD simulation of linear polymer chains in the bulk under Planar Elongational Flow (PEF) using Kraynik and Reinelt PBCs. Video made with VMD.
Simulations by Stefano Bernardi. Elongational Flow of Blends of Long and Short Polymers: Effective Stretch Relaxation Time. where chains are flexible and have a high molecular weight, such that they create entanglements.
A polymer (/ ˈ p ɒ l ɪ m ər /; Greek poly- "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits.
Due to their broad range of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life. Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as DNA.
Polymers, an international, peer-reviewed Open Access journal. Dear Colleagues, Semiflexible or wormlike polymer chains serve as a coarse-grained representation of macromolecules whenever random or self-avoiding walk statistics do not apply, i.e., when the dimensions of the macromolecule do not significantly exceed its persistence ent systems.
In transient elongational flow the polymer dynamics follow a coil-to-deformed coil transition with birefringence saturation not observed.
in flexible polymer chains influence both the. Elongational flow studies on flexible polymer chains in a pseudo-solvent Yasuyuki Maki, Naoki Sasaki, Mitsuo Nakata Colloid and Polymer Science (7), Cited by: When polymer chains are subject to strong flow, their shape changes from a random coil to rather extended conformations, and when the flow rate reaches a suffi- ciently large value, chain fracture can be observed.
Ex- tension and fracture in steady elongational flow with a. Flexible Polymer Chain Dynamics in Elongational Flow fulfills a need by presenting the most important advances in the field of flexible polymer chains in Title: Head of Biophysical.
from book Flexible Polymer Chains in Elongational Flow: Theory and Experiment (pp) The Rheology of Polymer Solutions in Porous Media Chapter January with Reads. Flow Properties of Polymers Time-independent Fluids.
Polymer solutions, dispersions, and melts are usually non-Newtonian liquids. This means their apparent viscosity (η) 1 depends on the applied shear rate and increases rapidly with increasing molecular weight (number of repeat units).
Thus, the viscosity of a polymer melt is always larger than that of the corresponding. Recent progress toward understanding the rheology of dilute solutions of flexible polymers is reviewed, emphasizing experimental results from flows imaging single deoxyribonucleic acid (DNA) molecules and filament-stretching rheometry of dilute polystyrene Boger fluids, as well as Brownian dynamics (BD) simulations of these flows.
The bead-spring Cited by: Figure 2: The zero shear viscosity is a sensitive measure of polymer molecular weight. The relationship for flexible linear polymers is ηo ~M w a with a = ± in this example Molecular Weight Distribution Beyond the Newtonian region, melt viscosity drops with increasing shear rate, a phenomenon called shear thinning.
Liu, S., B. Ashok, and M. Muthukumar, “ Brownian dynamics simulations of bead-rod-chain in simple shear flow and elongational flow,” Poly Cited by: Polymer dynamics are of central importance in materials science, mechanical engineering, biology and medicine1,2.
The dynamics of macromolecular solutions and melts in shear flow. Chain Flexibility - Temperature Polymer chains are not static, they are constantly vibrating and rotating. How much space or free volume there is around the chains determines,how much they can move.
The more thermal energy (heat) present, the more the chains will move and the more space between them. The more flexible the material/5(3). ranging from polymer processing to diffusion/mixing processes in complex flows, or bio-engineering studies of corporal flows.
One class of fluids that has received a great deal of attention are wormlike micellar solutions. Wormlike micelles, like polymer chains, stretch and orient under flow; they have the additional ability to break and reform.
able insights into polymer dynamics. For free chains in elongational flow, this technique revealed complex stretch-ing dynamics which are strongly dependent upon the ini-tial conformation [1,2]. The behavior of free molecules in shear flow was also studied by this technique, experimen-tally demonstrating the existence of a previously antici.
At low deformation rates the flow is steady and symmetric and appears Newtonian-like, while at high deformation rates we observe the onset of a flow asymmetry resembling the purely elastic instabilities reported in standard-shaped cross-slot by: 1. rotational component of the flow; this results in the droplet rotating at the same time as being stretched in the 45 direction with the result that the drop rotation preventing persistent stretching.
Polymer chain deformation in extensional and shear flow The concept of polymer chains acting like random coils. Polymer networks containing chemical bonds are called cross-linked polymers. One example of a cross-linked polymer is vulcanized synthetic rubber, used in automobile tires.
An example of a network polymer formed by weak connections is the gel formed by pectin. This natural network polymer is the basis for jellies and jams. Polybutadiene: NMR and temporary elasticity (J.P.
Cohen Addad). Chain relaxation processes of uniaxially stretched polymer chains: an infrared dichroism study (J.F. Tassin et al.). Chain conformation in elongational and shear flow as seen by SANS (R. Muller, C. Picot). Molecular rheology and linear viscoelasticity (G.
Marrin, J.P. Montfort). Flow Polymers manufactures additives and dispersions for the rubber and plastic industries which help processing and also compatibilizing of dis-similar materials.
A graft polymer molecule is a branched polymer molecule in which one or more of the side chains are different, structurally or configurationally, from the main chain.; A star-shaped polymer molecule is a branched polymer molecule in which a single branch point gives rise to multiple linear chains or arms.
If the arms are identical the star polymer molecule is said to be regular. Extensional Flow of Bulk Polymers T. J. Peng Propulsion Division A study was made of the behavior of polyisobutylene under motion at a constant stretch history for both strip biaxial extensional flow and simple extensional flow.
Steady-state non-Newtonian viscosities were observed at various constant stretch Size: KB.Chain-extended flexible polymers Citation for published version (APA): Flexible chains In contrast to spinning of "rigid chain" systems, flexible (regular) chains tend to fold during solidification.
Consequently in (elongational) flow field at a corresponding high rate of strain. These requirementsCited by: A key assumption used in the models of polymer dynamics and rheology is that the chains extend in the flow to reduce the viscosity and imbue the solution with elasticity Here we present a brief Cited by: 2.