Physical and Chemical Fundamentals of Building the Structure of Dispersed Filled Polymer Composite Materials and Nanocomposites

2021 ◽  
Vol 899 ◽  
pp. 694-700
Author(s):  
Igor D. Simonov-Emelyanov ◽  
Ksenia I. Kharlamova
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Strength Characteristics ◽  
Polymer Composite Materials ◽  
Generalized Model ◽  
Filled Polymer ◽  
Dispersed Filler ◽  
Reduced Parameters ◽  
Maximum Proportion ◽  
Physical And Chemical

Questions of the construction of dispersed structures of polymer composite materials using a generalized model of dispersed filled polymer composite materials (DFPCM) are studied. Using the parameter of maximum proportion of filler (φm) allows you to take into account the size, shape, and distribution of part of the dispersed filler at the same time. The transition to generalized and specified parameters when describing the structure of the DFPCM leads to the possibility of highlighting the optimal criteria for obtaining systems with the highest strength characteristics. The transition to generalized and reduced parameters when describing the structure of DFPCM leads to the possibility of selecting optimal criteria that ensure obtaining systems with the necessary level of rheological, electrochemical, physico-mechanical and other characteristics.

STRUCTURING OF CURED POLYMERIC COMPOSITE MATERIALS IN A MICROWAVE ELECTROMAGNETIC FIELD

2021 ◽  
pp. 3-9
Author(s):  
I. V. Zlobina
Keyword(s):  
Electromagnetic Field ◽  
Composite Materials ◽  
Polymer Composite ◽  
Contact Interaction ◽  
Energy Systems ◽  
Polymeric Composite ◽  
Strength Characteristics ◽  
Polymer Composite Materials ◽  
Reinforcing Fibers ◽  
The Matrix

Based on studies of the microstructure of the matrix of cured polymer composite materials and the area of its contact interaction with reinforcing fibers, the hypothesis of its structuring in the microwave electromagnetic field with an increase in the contact interaction surfaces due to an increase in the number of agglomerates with small transverse dimensions and a decrease in porosity in the macro- and mesopore regions is substantiated. These effects can be used as a basis for increasing the strength characteristics and uniformity of their values after exposure to a microwave electromagnetic field. The results of this work can be used in the development of technologies for finishing hardening of products made of carbon and fiberglass for various transport and energy systems.

THE USE OF THERMOSETTING MATRICES FOR THE MANUFACTURE OF POLYMER COMPOSITE MATERIALS BY THE NON-AUTOCLAVE MOLDING METHODS

2021 ◽  
pp. 22-33
Author(s):  
A.I. Tkachuk ◽  
◽  
K.I. Donetsky ◽  
I.V. Terekhov ◽  
R.Yu. Karavaev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Composite Materials ◽  
Polymer Composite ◽  
Operating Temperature ◽  
Strength Characteristics ◽  
Polymer Composite Materials ◽  
Glass Transition Temperatures ◽  
Epoxy Matrices ◽  
Molding Methods

In work, the rheological heat-resistant and elastic-strength characteristics of thermosetting systems developed at FSUE «VIAM» (epoxy matrices of grades VSE-20, VSE-30, VSE-33, bismaleimide grade VST-57 and cyan ester matrices of grades VST-1210 and VST-60) processed by non-autoclave technologies. These resins make it possible to obtain composite materials for structural purposes with an operating temperature from -60 to 250 °C by the methods of vacuum infusion, impregnation under pressure and film technology. The work also presents glass transition temperatures and mechanical properties of carbon and fiberglass plastics obtained on their basis.

MANUFACTURING TECHNOLOGIES OF POLYMER COMPOSITE MATERIALS ON THERMOPLASTICS (review)

2021 ◽  
pp. 78-86
Author(s):  
A.E. Sorokin ◽  
◽  
V.A. Sagomonova ◽  
A.P. Petrova ◽  
L.V. Solovyanchik ◽  
...  
Keyword(s):  
Composite Materials ◽  
Residual Stresses ◽  
Polymer Composite ◽  
Technological Process ◽  
Thermoplastic Composite ◽  
Strength Characteristics ◽  
Polymer Composite Materials ◽  
Complex Products ◽  
Thermoplastic Matrix ◽  
Manufacturing Technologies

Various technologies for the production of prepregs based on a thermoplastic matrix and composite materials based on them are considered. Their advantages over the technologies of manufacturing polymer composite materials based on a thermosetting matrix are presented. It is shown that the use of melt technology allows the production of fiberglass with the highest level of strength characteristics. An algorithm for estimating residual stresses in a thermoplastic composite to optimize the technological process of producing complex products is described.

Analysing dielectric interphase in carbon-black-filled polymer composite materials

2017 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Fouad Lahjomri ◽  
Yassine Nioua ◽  
Mohammed Essaid Achour ◽  
Salahddine El Bouazzaoui
Keyword(s):  
Composite Materials ◽  
Carbon Black ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Filled Polymer

High Power Switching Behavior in Conductor-Filled Polymer Composites

1997 ◽  
Vol 500 ◽  
Author(s):  
Anil R. Duggal ◽  
Lionel M. Levinson
Keyword(s):  
Composite Materials ◽  
Polymer Composites ◽  
Polymer Composite ◽  
High Power ◽  
Short Circuit ◽  
Polymer Composite Materials ◽  
Switching Behavior ◽  
Positive Temperature ◽  
Filled Polymer ◽  
Ptcr Effect

ABSTRACTIt has generally been assumed that the switching properties of conductor-filled polymer composites are based on a positive temperature coefficient of resistance (PTCR) effect where, at a certain switch temperature, the material resistivity increases by orders of magnitude. Here we present studies of the electrical switching behavior at high current densities which demonstrate that, in the high power regime, the observed switching is not based on the PTCR effect. Instead, we show that this type of switching appears to be a general feature in conductor-filled polymer composite materials and a qualitative model for the switching phenomenon is proposed. These results suggest that conductor-filled polymer composite materials can provide a new non-mechanical way of rapidly limiting high power short circuit currents. This should have broad applications in the circuit protection industry.

Repair technology features of main elements of road-building machines’ hydraulic system with use of polymer composite materials

2021 ◽  
Vol 0 (12) ◽  
pp. 9-12
Author(s):  
P. A. Ruzankin ◽  
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
Hydraulic System ◽  
Polymer Composite Materials ◽  
Hydraulic Systems ◽  
Road Building ◽  
Repair Technology ◽  
Dispersed Filler ◽  
Hydraulic Cylinders

Features of the operation and typical damages of standard hydraulic systems’ elements of road-building machines have been analyzed. The occurrence reasons of defects and the elimination ways of them were determined. Methods for eliminating the defects were analyzed, and it is shown that one of the most promising methods for eliminating the defects in liners of hydraulic cylinders and hydraulic lines is the use of polymer composite materials with a fibrous or dispersed filler for the repair.

scholarly journals Calculating the composition of dispersion-filled polymer composite materials of various structures

2020 ◽  
Vol 15 (1) ◽  
pp. 62-66
Author(s):  
Ch. N. Nguyen ◽  
M. V. Sanyarova ◽  
I. D. Simonov-Emel’yanov
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Polymer Composite ◽  
Filler Content ◽  
Polymer Composite Material ◽  
Polymer Matrices ◽  
Polymer Composite Materials ◽  
Filled Polymer ◽  
Different Types ◽  
Almost All

Objectives. The aim is to calculate the composition of dispersion-filled polymer composite materials with different fillers and structures and to highlight differences in the expression of said composition in mass and volume units.Methods. The paper presents the calculation of compositions in mass and volume units for various types of structures comprising dispersion-filled polymer composite materials according to their classification: diluted, low-filled, medium-filled, and highly-filled systems.Results. For calculations, we used fillers with densities ranging from 0.00129 (air) to 22.0 g/cm3 (osmium) and polymer matrices with densities between 0.8 g/cm3 and 1.5 g/cm3 , which represent almost all known fillers and polymer matrices used to create dispersion-filled polymer composite materials. The general dependences of the filler content on the ratio of the filler density to the density of the polymer matrix for dispersion-filled polymer composite materials with different types of dispersed structures are presented. It is shown that to describe structures comprising different types of dispersion-filled polymer composite materials (diluted, low-filled, medium-filled, and highly-filled) it is necessary to use only the volume ratios of components in the calculations. Compositions presented in mass units do not describe the construction of dispersion-filled polymer composite material structures because using the same composition in volume units, different ratios of components can be obtained for different fillers.Conclusions. The dependences of the properties of dispersion-filled polymer composite materials should be represented in the coordinates of the property – content of the dispersed phase only in volume units (vol % or vol. fract.) because the structure determines the properties. Compositions presented in mass units are necessary for receiving batches upon receipt of dispersion-filled polymer composite materials. Formulas are given for calculating and converting dispersion-filled polymer composite material compositions from bulk to mass units, and vice versa.

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