Analysis of the Structure of the Adsorbed Polymer Layers on the Surfaces of Metal Oxide Microparticles Using Digital Image Processing

Булычев, Н. А.; Kazaryan, М. A.; Ерохин, А. И.; Averyushkin, A. S.; Rabinskiy, Lev N.; Bodryshev, V. V.; Garibyan, B.A.

doi:10.1134/s0036029519130044

Cited by 6 publications

(1 citation statement)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of the method of digital image processing allows us to enter a quantitative criterion -the intensity of the image of the photo. This parameter is some indirect criterion of the physical process of interaction of the polymer and the solvent; it has a wide practical application in the analysis of complex processes in various fields: in gas dynamics (Abashev et al, Solodushkin et al, 2011), when analyzing the structure of adsorption layers of polymers on the surface of metal oxide microparticles (Bulychev et al, 2018a). Thus, the task is with the use of the criterion of the intensity of the image of photographs to analyze the process of phase separation of polymers taking into account its temperature-time nature and scale effect.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Geometric Characteristics of Two-Phase Polymer-Solvent Systems During the Separation of Solutions According to the Intensity of the Image of Micrographs

Булычев¹,

Bodryshev²,

Rabinskiy³

2019

PTQ

View full text Add to dashboard Cite

This paper discusses the study of the shapes and sizes of polymer droplets formed during the phase separation of their solutions with increasing temperature, as well as the parameters of the transitional layers of polymer condensing on the droplet surface formed during this process. For the study, a copolymer of polyethylene oxide and polypropylene oxide was chosen, whose behavior in aqueous solutions and the change in hydrophilic-hydrophobic balance depends on temperature. It has been established that the application of the method of digital image processing allows the introduction of the quantitative criterion – image intensity of a photo. For a more detailed study of the behavior of polymer molecules at the phase boundary, depending on the temperature, the studies of the temperature-dependent behavior of a number of polymers of different composition and structure have been carried out. The use of the digital image processing method for polymer droplets makes it possible to determine the parameters of droplets and their transition layers, to determine the dynamics of nucleation and droplet growth and density changes in the transition layer by the image intensity parameter. The paper has found out that embryos of pluronic are unevenly distributed by volume of solution with the presence of zones with a maximum number of molecules and a zone with a minimum of assembly of molecules. The practical value of the work is in the fact that the results of the study can be used to assess the dynamics of the separation of polymer solutions without involving the time-consuming and expensive instrumental methods of physical and chemical analysis.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis of Geometric Characteristics of Two-Phase Polymer-Solvent Systems During the Separation of Solutions According to the Intensity of the Image of Micrographs

Булычев¹,

Bodryshev²,

Rabinskiy³

2019

PTQ

View full text Add to dashboard Cite

show abstract

Fabrication and Testing of Rocket Engine Construction Elements by Addictive Production Approach

Orekhov

Shemetova

Yan³

2021

Wseas Transactions on Applied and Theoretical Mechanics

View full text Add to dashboard Cite

For the first time, using the technology of selective laser sintering, prototypes of rocket engine compressor blades were manufactured with subsequent analysis of the strength, technological, physical and mechanical characteristics of the product. The physical and mechanical properties of the manufactured blades were investigated, it was found that the short-term strength limit at 20 °C is 1450 MPa, and at 300 °C the ultimate strength is 1300 MPa, thus thermal losses in deformation resistance are no more than 12%, which allows the material to be used in aircraft construction, including for supersonic aircraft

show abstract

Design Calculations of the Limiting Characteristics of Heat Pipes for Cooling Active Phased Antenna Arrays

Radaev

2021

Wseas Transactions on Applied and Theoretical Mechanics

View full text Add to dashboard Cite

The article provides an algorithm for calculating the limiting characteristics of heat pipes for cooling active phased antenna arrays at a given saturation temperature. The maximum transmitted power is determined taking into account the limitations of the heat pipes operation by the capillary limit, by boiling (transition to film boiling, boiling limit), by the sonic limit at which the speed of steam reaches the speed of sound (sonic limit), by the entrainment of droplets liquid coolant from the surface of the wick with a counter flow of steam (entertainment limit) and viscous limit, which is realized at low temperatures (viscous limit). It is shown that an increase in the thickness of the wick and its porosity may be necessary to increase the capillary limit of heat pipes, while an increase in the thickness of the wick increases the thermal resistance of the tube and, accordingly, can lead to overheating of the cooled elements. Based on the above algorithm, design calculations for two types of heat pipes have been carried out. The dependences of various limits of the heat pipe on the operating temperature are plotted. Based on the above algorithm, calculations were performed for two types of heat pipes.

show abstract

Analysis of the Structure of the Adsorbed Polymer Layers on the Surfaces of Metal Oxide Microparticles Using Digital Image Processing

Cited by 6 publications

References 6 publications

Analysis of Geometric Characteristics of Two-Phase Polymer-Solvent Systems During the Separation of Solutions According to the Intensity of the Image of Micrographs

Analysis of Geometric Characteristics of Two-Phase Polymer-Solvent Systems During the Separation of Solutions According to the Intensity of the Image of Micrographs

Fabrication and Testing of Rocket Engine Construction Elements by Addictive Production Approach

Design Calculations of the Limiting Characteristics of Heat Pipes for Cooling Active Phased Antenna Arrays

Contact Info

Product

Resources

About