scholarly journals Phase separation dynamics in aqueous solutions of thermoresponsive polymers

2021 ◽  
Vol 24 (4) ◽  
pp. 43601
Author(s):  
V. Kovalchuk
Keyword(s):  
Phase Separation ◽  
Interfacial Energy ◽  
Energy Parameter ◽  
Intermediate Stage ◽  
Cellulose Solution ◽  
Thermoresponsive Polymers ◽  
Scalar Order Parameter ◽  
Modelling Techniques ◽  
Cahn Hilliard Equation ◽  
Kinetics Of

Phase transition kinetics of aqueous hydroxypropyl cellulose solution was studied by using turbidimetric monitoring and mathematical modelling techniques. Based on the nonlinear Cahn-Hilliard equation with a mobility depending on the component concentration, the phase separation has been modeled on a simple one-dimensional Flory lattice. For value set of the interfacial energy parameter, data were obtained on the changing of the average values of the cluster sizes, their mass and concentration. The simulation results allow us to distinguish three stages of the spinodal decomposition: early, intermediate and final. It was found that for the intermediate stage, the kinetics of the cluster mass growth is described by a dependence that is characteristic of the usual diffusion mass transfer; the change in the average cluster size can be represented by a scaling function with an exponent close to 1/3, typical of the systems with a conserved scalar order parameter. It is shown that the concentration of clusters at the final stage is determined by the temperature dependence of the interfacial energy.

Kinetics of the α-α′ phase separation in a 14%Cr oxide dispersion steel at intermediate temperatures

2020 ◽  
pp. 129088
Author(s):  
Yael Templeman ◽  
Malki Pinkas ◽  
Eli Brosh ◽  
Einat Strumza ◽  
Shmuel Hayun ◽  
...  
Keyword(s):  
Phase Separation ◽  
Oxide Dispersion ◽  
Α Phase ◽  
Kinetics Of

Phase Separation of β-SN in Strained, Compositionally Metastable Ge1-xSnx Alloys

1995 ◽  
Vol 398 ◽  
Author(s):  
Joshua W. Kriesel ◽  
Susanne M. Lee
Keyword(s):  
Phase Separation ◽  
Electron Microprobe ◽  
Rf Sputtering ◽  
Melting Behavior ◽  
Solubility Limit ◽  
X Ray Diffraction ◽  
Solid Solubility Limit ◽  
Transformation Mechanisms ◽  
Subsequent Phase ◽  
Kinetics Of

ABSTRACTUsing rf sputtering and post-deposition annealing in a differential scanning calorimeter (DSC), we manufactured bulk (4000 nm) films of crystalline Ge0.83Sn0.17. This Sn concentration is much greater than the solid solubility limit of Sn in Ge (x ≤ 0.01). Continued annealing thermally induces Sn phase separation from the alloy, limiting the ultimate attainable grain size in the metastable crystals. We examine, here, the mechanisms and kinetics of the processes limiting the size of the Ge0.83Sn0.17 polycrystals. From a combination of DSC, electron microprobe, and x-ray diffraction (XRD) measurements, we propose phase transformation mechanisms corresponding to crystallization of amorphous Ge0.83Sn0.17, crystallization of an as-yet unidentified phase of Sn, and phase separation of Sn from the Ge1-xSnx crystals. We were unable to observe the unidentified phase of Sn in XRD, but the phase must be present in the material to account for the quantitative discrepancies (as much as 8 at.%) in Sn percentages determined from each of the DSC, XRD, and electron microprobe measurements. Our models for the various transformation kinetics were corroborated by the subsequent phase-separated Sn melting behavior observed in the DSC: two Sn melting endotherms, one of which was 20–100°C lower than the bulk melting temperature of Sn. This depressed temperature endotherm we speculate represents liquefaction of nanometer-sized (β–Sn clusters.

scholarly journals Thermodynamics and kinetics of phase separation of protein-RNA mixtures by a minimal model

2021 ◽  
Vol 120 (7) ◽  
pp. 1219-1230 ◽  
Author(s):  
Jerelle A. Joseph ◽  
Jorge R. Espinosa ◽  
Ignacio Sanchez-Burgos ◽  
Adiran Garaizar ◽  
Daan Frenkel ◽  
...  
Keyword(s):  
Phase Separation ◽  
Minimal Model ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of

Phase-separation kinetics of a multicomponent alloy

1999 ◽  
Vol 60 (2) ◽  
pp. 822-830 ◽  
Author(s):  
S. Mazumder ◽  
D. Sen ◽  
I. S. Batra ◽  
R. Tewari ◽  
G. K. Dey ◽  
...  
Keyword(s):  
Phase Separation ◽  
Multicomponent Alloy ◽  
Phase Separation Kinetics ◽  
Kinetics Of ◽  
Separation Kinetics

Kinetics of the phase separation of a low-viscosity liquid supersaturated with gas at the intermediate and later stages

2005 ◽  
Vol 67 (1) ◽  
pp. 85-96 ◽  
Author(s):  
V. V. Slezov ◽  
A. S. Abyzov ◽  
Zh. V. Slezova
Keyword(s):  
Phase Separation ◽  
Low Viscosity ◽  
Kinetics Of

Investigation on Phase Separation Kinetics of Polyolefin Blends through Combination of Viscoelasticity and Morphology

2009 ◽  
Vol 113 (26) ◽  
pp. 8820-8827 ◽  
Author(s):  
Yanhua Niu ◽  
Liang Yang ◽  
Katsumi Shimizu ◽  
Jai A. Pathak ◽  
Howard Wang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Polyolefin Blends ◽  
Phase Separation Kinetics ◽  
Kinetics Of ◽  
Separation Kinetics

Features of Phase Separation Kinetics of Solid 3He-4He Mixtures. Role of Boundary Resistance

2005 ◽  
Vol 138 (3-4) ◽  
pp. 823-828
Author(s):  
N. Mikhin ◽  
V. Grigor’ev ◽  
V. Maidanov ◽  
A. Penzev ◽  
S. Rubets ◽  
...  
Keyword(s):  
Phase Separation ◽  
Boundary Resistance ◽  
Phase Separation Kinetics ◽  
Kinetics Of ◽  
Separation Kinetics ◽  
Solid 3He
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