Physical Parameters of Polymer Composite Materials Created on the Basis of Low and High Molecular Weight Rubbers

ABSTRACT. The theoretical foundations of the structural and mechanical behavior of filled three-dimensional cross-linked elastomers are supplemented. Numerical experiments are carried out, based on the data of numerical experiments, three dimensional cross linked, filled with dispersed particles frost-resistant elastomers based on low and high molecular weight rubbers are developed. Theoretical and experimental data are compared and their good convergence is shown. Comparison of the physical parameters of the composites created by the authors on the basis of low and high molecular weight rubbers showed that the deformation characteristics of the composite based on high molecular weight rubbers are many times superior to composites based on low molecular weight, as well as their glass transition temperature is also very different. The created composites are recommended as a structural material in relation to the engineering problem of creating wear-resistant parts and components of road and air transport operated in a wide temperature range, including the Far North and the Arctic. &nbsp

Dependence of the mechanical fracture energy of the polymeric composite material from the mixture of filler fractions

This paper for the first time presents an equation for calculating the mechanical fracture energy of the polymeric composite material (PCM) with regard to the basic formulation parameters. By means of the developed computer program the authors calculated the mechanical fracture energy of the polymer binder of the 3D cross-linked plasticized elastomer filled with multifractional silica. The solution of the integral equation was implemented using the corresponding dependence of stress on relative elongation at uniaxial tension. Engineering application of the theory was considered with respect to asphalt road covering. The authors proposed a generalized dependence of ruptural deformation of the polymer binder from the effective concentration of chemical and physical (intermolecular) bonds for calculating the mechanical fracture energy of available and advanced PCMs as filled elastomers

Dependence of mechanical characteristics from composition and structure and optimization of mechanical fracture energy of polymer composite material based on high-molecular rubbers

By means of numerical experiment the authors investigate dependence of conventional rupturing stress and mechanical fracture energy at uniaxial tension from fractional composition of dispersed filler, plasticizer volume fraction in polymer binder, effective density of transverse bonds, applied to development of covering for different purposes and with advanced service life in temperature range from 223 to 323 K. They compare mechanical characteristics of polymer composite materials (PCMs) based on high- and low-molecular rubbers. It was shown that rupturing stress of high-molecular rubber-based PCM is of a higher magnitude than the stress of low-molecular rubber-based one at almost invariable rupturing deformation. Numerical simulation by variation of composition parameters and molecular structure enables evaluation of its maximum fracture energy which is 1000 times higher than mechanical fracture energy of similar composites based on low-molecular rubbers

THE PREDICTION OF WATER CUTTING AND DENSITY OF OILWATERCONDENSAT MIXES

This article is devoted to studying of problems, existence of a significant amount of gas-condensate deposits of Azerbaijan causes high prospects of use of condensate also as a thinner at pipeline transport high-viscosity flooded by the crude oil. Finds relevance of an assessment of influence of concentration and viscosity of a thinner – condensate on physical and chemical characteristics of petrowater condensate mixes at various temperatures and the modes of currents. It is well-known the facts that availability of the dispersed water in petrocondensate mix reduces efficiency of operation of pipelines. So, the increase in volume of water and raised viscosity leads to rise in price of transportation by petrowater condensate mix. Besides the high content of the connected water in mix causes intensive education by asfaltqamparafin postponed, increases oil hardening temperature. On it regular control for changes of noted parameters (degree of water content and density of mix) is of great importance. Considering the aforesaid, for an assessment of influence of the content of condensate on reophysics indicators transported bypass crude oil at various temperatures laboratory researches were conducted. On the basis of the obtained data on test various petrowater condensate mixes were offered empirical a formula for determination of their water content and density. The analysis showed that the offered empirical models in comparison with the rule of additivity yield more acceptable results from the point of view of practice and will well be coordinated with data experimental defined the distinguished parameters

Dependence of the mechanical fracture energy of the polymeric composite material from the mixture of filler fractions

This paper for the first time presents an equation for calculating the mechanical fracture energy of the polymeric composite material (PCM) with regard to the basic formulation parameters. By means of the developed computer program the authors calculated the mechanical fracture energy of the polymer binder of the 3D cross-linked plasticized elastomer filled with multifractional silica. The solution of the integral equation was implemented using the corresponding dependence of stress on relative elongation at uniaxial tension. Engineering application of the theory was considered with respect to asphalt road covering. The authors proposed a generalized dependence of ruptural deformation of the polymer binder from the effective concentration of chemical and physical (intermolecular) bonds for calculating the mechanical fracture energy of available and advanced PCMs as filled elastomers

CHOICE OF AN ELLIPTIC CURVE AND DEVELOPMENT OF AN ALGORITHM OF ADDITION OF ITS POINTS WITH RATIONAL COORDINATES ON A FINITE FIELD

The article deals with the problems of solving problems of determining and calculating EC parameters for the correct implementation of asymmetric cryptoalgorithms. Using the Vieta formulas, for the roots of polynomials, the method of choosing the coefficients is given. The interval for selecting the base point is indicated. The formulas of the tangent to the base point and finding the coordinates of the point of intersection of the tangent with the EC are determined. A recurrence formula is obtained for the addition of a base point with other points of EC with rational coordinates