scholarly journals Nanostate factor in polymer nanocomposites technology

2021 ◽  
pp. 13-17
Author(s):  
S. V. Avdeychik ◽  
V. A. Goldade ◽  
V. A. Struk ◽  
A. S. Antonov ◽  
A. N. Lesun
Keyword(s):  
Activation Energy ◽  
Composite Materials ◽  
Polymer Nanocomposites ◽  
Optimal Parameters ◽  
Energy Characteristics ◽  
Polymer Systems ◽  
Tribotechnical Properties ◽  
Methodological Approaches ◽  
Metal Polymer ◽  
Different Levels

Methodological approaches to the implementation of the nanostate phenomenon in the formation of the optimal structure of composite materials and metal-polymer systems at different levels of organization have been developed. The concept of energy and technological conformity of the components of functional composite materials and systems is proposed. This concept consists in ensuring the parameters of composite materials energy characteristics adequate to the value of the activation energy of the prevailing structural process, which determines the optimal parameters of stress-strain, adhesion and tribotechnical properties under technological influences on the components in the process of obtaining composite and its processing. The concept has been tested in the development of nanocomposites based on industrial polymer matrices, which surpass analogues in terms of service properties.

Improvement of Electrical Insulating and Anti-Wear Properties of Composites Used in Telemetry Systems

2015 ◽  
Vol 792 ◽  
pp. 578-581
Author(s):  
A.R. Gallyamov ◽  
I.D. Ibatullin ◽  
A.Y. Murzin
Keyword(s):  
Composite Materials ◽  
Epoxide Resin ◽  
Wear Properties ◽  
Research Results ◽  
Tribotechnical Properties ◽  
Properties Of Composites

This article deals with the research results of electroinsulated and tribotechnical properties of composite materials on the basis of epoxide resin. The effect of fillers — micro-and nanopowders of various materials - on the properties of composites is examined. The use of composites in the manufacture of separators for telemetry systems is demonstrated.

Influence of the range of grinding thermo-expanded graphite on physical-mechanical and tribotechnical properties of composite materials produced on its basis

2018 ◽  
Vol 5 (12) ◽  
pp. 26113-26118
Author(s):  
Elena Matygullina ◽  
Dmitrii Karavaev ◽  
Lyudmila Sirotenko ◽  
Almaz Khanov ◽  
Oleg Isaev
Keyword(s):  
Composite Materials ◽  
Expanded Graphite ◽  
Tribotechnical Properties

Effect of Carbon Black Addition on the Rheology Properties of Electrically Conductive PP-Graphite Composite

2011 ◽  
Vol 233-235 ◽  
pp. 3057-3063 ◽  
Author(s):  
Yovial Mahyoedin ◽  
Jaafar Sahari ◽  
Andanastuti Mukhtar ◽  
Norhamidi Mohammad
Keyword(s):  
Activation Energy ◽  
Composite Materials ◽  
Carbon Black ◽  
Injection Molding ◽  
Solid Loading ◽  
Molding Machine ◽  
Injection Molding Machine ◽  
Graphite Composite ◽  
Twin Screw ◽  
Varied Composition

This investigation gives attention on the rheology characteristics of polymer composites based on graphite and carbon black as fillers for further processing using an injection molding machine. In such a high solid loading system, the particles exhibit a very strong tendency toward agglomeration. This rapidly increases the viscosity of the mixture and decreases moldability. The presence of agglomerates in the mixture in particular may result in defect within the microstructure in the final product, even though it is sometime necessary in electrical conductivity. Composite materials in this study are polypropylene (PP) as matrix, and graphite (G) and carbon black (CB) as fillers, with a varied composition according to the percentage weight (% wt) of CB. Twin screw co-rotating extruder was used for mixing materials in order to achieve the best homogeneity of this compound. The measurement results obtained using capillary rheometer equipment showed that the addition of CB to the mixture of PP/G increase the viscosity of the materials, increase the activation energy and generally reduce the fluidity of composite materials. The value of the mixture viscosity increases with increasing the number of CB, reducing the ability of materials to be formed (moldability). Material viscosity, activation energy, fluidity and moldability shows how suitable the compound material to be processed by using injection molding machine.

scholarly journals CONCEPTUAL DESIGN OF THE WING OR FUSELAGE STRUCTURE OF A MAINLINE AIRCRAFT MADE OF METAL-POLYMER COMPOSITE MATERIALS

2021 ◽  
pp. 74-82
Author(s):  
Valery Pechenyuk ◽  
◽  
Yuri Popov ◽  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Material ◽  
Polymer Composite Materials ◽  
Design Stage ◽  
Aluminum Sheets ◽  
Preliminary Design Stage ◽  
Modified Formula ◽  
Metal Polymer

The analysis of existing aircraft structures made of metal-polymer composite materials is carried out, and a list of them with passport characteristics is compiled. The Fokker F-27 Friendship, Boeing-777 and Airbus A380, which use ARALL and GLARE materials, were selected as the aircraft under study. Formulas are determined and the distribution of normal force flows between metal and composite elements in the composition of MPCM based on aluminum sheets (aluminum-fiberglass – SIAL- 1-1, SIAL-3-1 and SIAL-1441 (9/8)) and titanium alloys (samples of titanium-carbon fiber from the patent-Example 1 and Example 3). To determine these parameters, the formulas used for a composite structure made of different materials are used. On the basis of the specification known MPCM the modified formula mixture rule for calculating the strength of new materials with a given set of orientation angles of PCM and the presence of layers of sheet metal, a comparison with standard mechanical characteristics and to show the efficiency of these formulas. Using these formulas, you can determine the strength characteristics for an arbitrary composition of the MPCM package. The features of the choice of design permissible stresses for the design of the airframe of a mainline aircraft made of metal-polymer composite material are highlighted. The concept of designing aircraft airframe elements using MPCM is considered. The results of this work will allow us to determine the rational components of the metal-polymer composite material and the structure of their distribution in the airframe design at the preliminary design stage.

Hole-Like Defects in n-Channel 4H-SiC MESFETs Observed by Current Transient Spectroscopy

2005 ◽  
Vol 483-485 ◽  
pp. 865-868
Author(s):  
Jean Marie Bluet ◽  
M. Gassoumi ◽  
I. Dermoul ◽  
F. Chekir ◽  
H. Maaref ◽  
...  
Keyword(s):  
Activation Energy ◽  
Electron Emission ◽  
Interfacial Layer ◽  
Broad Band ◽  
Current Transient ◽  
Linear Regime ◽  
Saturation Regime ◽  
Transient Spectroscopy ◽  
Different Levels

Conductance DLTS measurements have been performed on 4H-SiC MESFETs. A broad band due to electron emission by different levels is observed. An additional “hole-like” level with activation energy of 0.9 eV is obtained in linear regime but not in saturation regime. From the results, it is proposed that this “hole-like” signal is due to capture of electron present at a conductive SiC/SiO2 interfacial layer.

Synthesis and Thermal Conversions of Unsaturated Cobalt(II) Monocarboxylates: Precursors for Metal Polymer Nanocomposites

2018 ◽  
Vol 63 (8) ◽  
pp. 1041-1049 ◽  
Author(s):  
A. S. Pronin ◽  
S. A. Semenov ◽  
D. V. Drobot ◽  
G. I. Dzhardimalieva
Keyword(s):  
Polymer Nanocomposites ◽  
Metal Polymer
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