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Phase behavior actuating morphology and rheological response of polybutadiene/polyisoprene blends under small amplitude oscillatory shear. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1443-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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2
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Zou F, Dong X, Liu W, Yang J, Lin D, Liang A, Li W, Han CC. Shear Induced Phase Boundary Shift in the Critical and Off-Critical Regions for a Polybutadiene/Polyisoprene Blend. Macromolecules 2012. [DOI: 10.1021/ma2021562] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fasheng Zou
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xia Dong
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Liu
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jian Yang
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Demiao Lin
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Aimin Liang
- Yanshan Branch, SINOPEC Beijing Research Institute of Chemical Industry, Beijing 102500, China
| | - Wei Li
- Yanshan Branch, SINOPEC Beijing Research Institute of Chemical Industry, Beijing 102500, China
| | - Charles C. Han
- State Key Laboratory of Polymer
Physics and Chemistry and CAS Key Laboratory of Engineering Plastics,
Joint Laboratory of Polymer Science and Materials, Beijing National
Laboratory for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Chen XB, Niu LS, Shi HJ. Numerical simulation of the phase separation in binary lipid membrane under the effect of stationary shear flow. Biophys Chem 2008; 135:84-94. [DOI: 10.1016/j.bpc.2008.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2008] [Revised: 03/26/2008] [Accepted: 03/26/2008] [Indexed: 01/08/2023]
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Harting J, Giupponi G, Coveney PV. Structural transitions and arrest of domain growth in sheared binary immiscible fluids and microemulsions. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 75:041504. [PMID: 17500899 DOI: 10.1103/physreve.75.041504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Indexed: 05/15/2023]
Abstract
We investigate spinodal decomposition and structuring effects in binary immiscible and ternary amphiphilic fluid mixtures under shear by means of three-dimensional lattice Boltzmann simulations. We show that the growth of individual fluid domains can be arrested by adding surfactant to the system, thus forming a bicontinuous microemulsion. We demonstrate that the maximum domain size and the time of arrest depend linearly on the concentration of amphiphile molecules. In addition, we find that for a well-defined threshold value of amphiphile concentration, the maximum domain size and time of complete arrest do not change. For systems under constant and oscillatory shear we analyze domain growth rates in directions parallel and perpendicular to the applied shear. We find a structural transition from a sponge to a lamellar phase by applying a constant shear and the occurrence of tubular structures under oscillatory shear. The size of the resulting lamellae and tubes depends strongly on the amphiphile concentration, shear rate, and shear frequency.
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Affiliation(s)
- J Harting
- Institute for Computational Physics, University of Stuttgart, Pfaffenwaldring 27, 70569 Stuttgart, Germany
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Wagner NJ, Öttinger HC, Edwards BJ. Generalized Doi–Ohta model for multiphase flow developed via generic. AIChE J 2006. [DOI: 10.1002/aic.690450603] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Colombani J, Bert J. Early sedimentation and crossover kinetics in an off-critical phase-separating liquid mixture. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2004; 69:011402. [PMID: 14995616 DOI: 10.1103/physreve.69.011402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2003] [Indexed: 05/24/2023]
Abstract
Early sedimentation in a liquid mixture off-critically quenched in its miscibility gap was investigated with a light attenuation technique. The time evolution of the droplet distribution is characteristic of an emulsion coalescing by gravitational collisions. This sedimentation behavior gave access to the phase-separating kinetics, and a crossover on the way toward equilibrium was observed, which separates free growth from conserved order-parameter coarsening with a crossover time fitting well with theoretical predictions.
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Affiliation(s)
- J Colombani
- Laboratoire Physique de la Matière Condensée et Nanostructures, Université Claude Bernard Lyon, F-69622 Villeurbanne Cedex, France.
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Xu A, Gonnella G, Lamura A. Phase-separating binary fluids under oscillatory shear. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 67:056105. [PMID: 12786218 DOI: 10.1103/physreve.67.056105] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2002] [Indexed: 05/24/2023]
Abstract
We apply the lattice Boltzmann methods to study the segregation of binary fluid mixtures under oscillatory shear flow in two dimensions. The algorithm allows to simulate systems whose dynamics is described by the Navier-Stokes and the convection-diffusion equations. The interplay between several time scales produces a rich and complex phenomenology. We investigate the effects of different oscillation frequencies and viscosities on the morphology of the phase separating domains. We find that at high frequencies the evolution is almost isotropic with growth exponents 2/3 and 1/3 in the inertial (low viscosity) and diffusive (high viscosity) regimes, respectively. When the period of the applied shear flow becomes of the same order of the relaxation time T(R) of the shear velocity profile, anisotropic effects are clearly observable. In correspondence with nonlinear patterns for the velocity profiles, we find configurations where lamellar order close to the walls coexists with isotropic domains in the middle of the system. For particular values of frequency and viscosity it can also happen that the convective effects induced by the oscillations cause an interruption or a slowing of the segregation process, as found in some experiments. Finally, at very low frequencies, the morphology of domains is characterized by lamellar order everywhere in the system resembling what happens in the case with steady shear.
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Affiliation(s)
- Aiguo Xu
- Istituto Nazionale per la Fisica della Materia, Unità di Bari, Università di Bari, 70126 Bari, Italy
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8
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Zhang Z, Zhang H, Yang Y. The effect of shear flow on morphology and rheology of phase separating binary mixtures. J Chem Phys 2000. [DOI: 10.1063/1.1313553] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Corberi F, Gonnella G, Lamura A. Structure and rheology of binary mixtures in shear flow. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 2000; 61:6621-6631. [PMID: 11088342 DOI: 10.1103/physreve.61.6621] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2000] [Indexed: 05/23/2023]
Abstract
Results are presented for the phase separation process of a binary mixture subject to a uniform shear flow quenched from a disordered to a homogeneous ordered phase. The kinetics of the process is described in the context of the time-dependent Ginzburg-Landau equation with an external velocity term. The large-n approximation is used to study the evolution of the model in the presence of a stationary flow and in the case of an oscillating shear. For stationary flow we show that the structure factor obeys a generalized dynamical scaling. The domains grow with different typical length scales Rx and R( perpendicular), respectively, in the flow direction and perpendicularly to it. In the scaling regime R( perpendicular) approximately t(alpha( perpendicular)) and Rx approximately gammat(alpha(x)) (with logarithmic corrections), gamma being the shear rate, with alpha(x)=5/4 and alpha( perpendicular)=1/4. The excess viscosity Deltaeta after reaching a maximum relaxes to zero as gamma(-2)t(-3/2). Deltaeta and other observables exhibit logarithmic-time periodic oscillations which can be interpreted as due to a growth mechanism where stretching and breakup of domains occur cyclically. In the case of an oscillating shear a crossover phenomenon is observed: Initially the evolution is characterized by the same growth exponents as for a stationary flow. For longer times the phase-separating structure cannot align with the oscillating drift and a different regime is entered with an isotropic growth and the same exponents as in the case without shear.
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Affiliation(s)
- F Corberi
- Istituto Nazionale per la Fisica della Materia, Unita di Salerno and Dipartimento di Fisica, Universita di Salerno, 84081 Baronissi (Salerno), Italy
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Kaatze U, Mirzaev SZ. Slowing Down in Chemical Reactions. The Isobutyric Acid/Water System in the Critical Region. J Phys Chem A 2000. [DOI: 10.1021/jp0000984] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- U. Kaatze
- Drittes Physikalisches Institut, Georg-August Universität, Bürgerstrasse 42-44, D-37073 Göttingen, Germany
| | - S. Z. Mirzaev
- Heat Physics Department, Uzbek Academy of Sciences, Katartal Str. 28, 700135 Tashkent, Uzbekistan
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Hamano K, Ishii T, Ozawa M, Sengers JV, Krall AH. Critical-point rheology of a sheared phase-separating micellar solution. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 51:1254-1262. [PMID: 9962767 DOI: 10.1103/physreve.51.1254] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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12
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Hashimoto T, Matsuzaka K, Moses E, Onuki A. String phase in phase-separating fluids under shear flow. PHYSICAL REVIEW LETTERS 1995; 74:126-129. [PMID: 10057715 DOI: 10.1103/physrevlett.74.126] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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