scholarly journals Features of Contact Interaction of Anti-Friction-Wear-Resistant Polypropylene Composite Materials with Raw Cotton

2021 ◽  
Vol 07 (11) ◽  
Author(s):  
Sayibjan Sadikovich Negmatov ◽  
Keyword(s):  
Composite Materials ◽  
Contact Interaction ◽  
Coefficient Of Friction ◽  
Polymer Materials ◽  
Composite Polymer ◽  
Polypropylene Composite ◽  
Wear Resistant ◽  
The Coefficient Of Friction ◽  
Electric Theory

Based on the concepts of the theory of interaction and research in the course of researching the process of studying the interaction of composite polymer materials using the method of modeling interaction - the mechano-electric theory of contact interaction. The proposed formula for determining the coefficient of friction of composite polymer materials using pulp (raw cotton).

scholarly journals Composite polypropylene polymer materials that work in contact with raw cotton

2021 ◽  
Vol 264 ◽  
pp. 05055
Author(s):  
Оlim Eshkobilov ◽  
Giyas Gulyamov
Keyword(s):  
Composite Materials ◽  
Contact Interaction ◽  
Coefficient Of Friction ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Polymer Materials ◽  
Tribotechnical Properties ◽  
Structural Composite ◽  
The Coefficient Of Friction ◽  
Friction Temperature

Physicomechanical and tribotechnical properties of structural composite materials based on thermoplastic polymer and organomineral ingredients operating under friction and wear conditions during contact with pulp (raw cotton) have been investigated. The regularities of changes in the physical, mechanical and tribotechnical properties of structural composite materials during contact interaction with raw cotton were determined, the dependence of their properties on the type and content of graphite, mineral and fibrous fillers in structural composite materials was studied. It has been established that the nature and structure of fillers has a certain effect on the physical and mechanical properties of composite materials based on polypropylene. At the same time, fiber-filled compositions have the highest mechanical strength. It was also found that when mineral fillers are introduced into composite polymer materials, their coefficient of friction with raw cotton increases significantly, while the wear rate decreases, except for fillers with a plate structure (kaolin, talc), when used, a decrease in the coefficient of friction is observed. The introduction of carbon-graphite fillers into the composition of composite materials leads to a significant decrease in the coefficient of friction, temperature and static electricity charge in the friction zone with raw cotton. The introduction of fillers with a fibrous structure leads to a significant decrease in the rate of wear of the composites. It provides high strength and resistance of the material under thermomechanical action. Effective compositions of structural composite materials for work under conditions of contact interaction with fibrous mass have been developed, and their physical, mechanical and tribotechnical properties have been investigated.

Composite Polymer Materials and the Details Made of them for Cotton Machines and Mechanisms

2011 ◽  
Vol 413 ◽  
pp. 535-538
Author(s):  
Nodira Abed-Negmatova ◽  
Jakhongir Negmatov ◽  
Giyoz Gulyamov ◽  
Aziz Yuldashev ◽  
Sherzod Eminov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Tribological Properties ◽  
High Strength ◽  
Polymer Materials ◽  
Composite Polymer ◽  
Polypropylene Composite ◽  
Wear Resistant ◽  
Mechanical And Tribological Properties ◽  
Experimental Researches

We have done experimental researches of study of impact of different fillers on physical, mechanical and tribological properties and found the optimal substance of fillers, which provides with best properties of polypropylene composite materials. We suggested the principle of construction of antifriction and antifriction-wear resistant polypropylene composite materials, which have high strength and tribological properties and used in cotton machines and mechanisms.

Tribotechnical properties of composite materials based on thermoplastic polymer and organomineral fillers working under contact interaction with cotton-fiber

2020 ◽  
Vol 5 ◽  
pp. 66-74
Author(s):  
S.S. Negmatov ◽  
◽  
N.S. Abed ◽  
G. Gulyamov ◽  
T.S. Khalimzhanov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Wear Rate ◽  
Contact Interaction ◽  
Coefficient Of Friction ◽  
High Strength ◽  
Thermoplastic Polymer ◽  
Friction Zone ◽  
Tribotechnical Properties ◽  
The Coefficient Of Friction ◽  
Mineral Fillers

The tribotechnical properties of composite materials (CM) based on a thermoplastic polymer and organomineral fillers operating under conditions of contact interaction with pulp are investigated using the example of raw cotton. The regularities of changes in the coefficient of friction and the intensity of wear of composites during contact interaction with raw cotton have been determined, the dependences of the temperature and magnitude of the electrostatic charge in the polymer-cotton and composite-cotton friction zone on the type and content of organic-mineral fillers in the CM have been studied. It has been established that the introduction of carbon-graphite fillers into the CM composition leads to a significant decrease in the friction coefficient, temperature and static electricity charge in the friction zone with raw cotton. The introduction of mineral fillers into CMs noticeably increases their coefficient of friction with raw cotton, the temperature and charge of electrostatic electricity in the friction zone with a simultaneous decrease in the wear rate, with the exception of fillers with a lamellar structure (talc, kaolin), when used, a decrease in the coefficient of friction is observed. The introduction of fillers with a fibrous structure leads to a significant decrease in the wear rate of polymer CMs and provides high strength and durability of the material under thermomechanical action. Effective compositions of antifriction and wear-resistant polymeric CMs have been developed for work in conditions of contact interaction with raw cotton.

Antifriction Wear-Resistant Composite Materials and Details Made from them for Working Bodies of Cotton Machines and Mechanisms

2012 ◽  
Vol 616-618 ◽  
pp. 2005-2008 ◽  
Author(s):  
N.S. Abed Negmatova ◽  
S.S. Negmatov ◽  
G. Gulyamov ◽  
J.N. Negmatov
Keyword(s):  
Composite Materials ◽  
Polymer Materials ◽  
Composite Polymer ◽  
Wear Resistant ◽  
Working Bodies

We researched and developed the composite polymer materials and products from them, working in conjunction with raw-cotton. It is established that the production of friction pairs of working parts of machines (pegs) made of developed composite polymer materials increases their efficiency and durability to 2.0 -2.2 times.

scholarly journals Research of the drawing of bars plate in the refiners

2021 ◽  
Vol 2094 (4) ◽  
pp. 042038
Author(s):  
S N Vikharev ◽  
VA Morkovin
Keyword(s):  
Friction Coefficient ◽  
Contact Interaction ◽  
Coefficient Of Friction ◽  
Wood Pulp ◽  
Contact Processes ◽  
Low Concentration ◽  
The Coefficient Of Friction ◽  
Radial Arrangement

Abstract Object of research of article is the drawing of bars plate in the refiners at refining of chips and wood pulp. On the basis of the theory of contact interaction of bars influence of the drawing of plate on characteristics of contact processes is investigated. The friction coefficient between plate decreases at increase in density of contact of bars. At increase in an angle of crossing of bars rotor and stator and refining of pulp with concentration up to 6% the coefficient of friction decreases. At increase in an angle of crossing of bars chips and pulp with concentration over 10% the coefficient of friction increases. Therefore it is recommended to increase the angle of crossing of bars rotor and stator at refining of pulp of low concentration, and at refining of pulp of concentration over 10% and chips - to reduce, up to a radial arrangement.

Corrosion and tribological properties of basalt fiber reinforced composite materials

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540021
Author(s):  
Jin Cheol Ha ◽  
Yun-Hae Kim ◽  
Myeong-Hoon Lee ◽  
Kyung-Man Moon ◽  
Se-Ho Park
Keyword(s):  
Composite Materials ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Wear Behavior ◽  
Basalt Fiber ◽  
Metallic Materials ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
The Coefficient Of Friction

This experiment has examined the corrosion and tribological properties of basalt fiber reinforced composite materials. There were slight changes of weight after the occurring of corrosion based on time and H 2 SO 4 concentration, but in general, the weight increased. It is assumed that this happens due to the basalt fiber precipitate. Prior to the corrosion, friction-wear behavior showed irregular patterns compared to metallic materials, and when it was compared with the behavior after the corrosion, the coefficient of friction was 2 to 3 times greater. The coefficient of friction of all test specimen ranged from 0.1 to 0.2. Such a result has proven that the basalt fiber, similar to the resin rubber, shows regular patterns regardless of time and H 2 SO 4 concentration because of the space made between resins and reinforced materials.

scholarly journals Determination of the optimal strength of contact interaction of the tool and the part during finishing-hardening treatment by diamond smoothing

2020 ◽  
Vol 65 (3) ◽  
pp. 310-316
Author(s):  
V. V. Domasevich ◽  
T. A. Ahmetov ◽  
M. P. Kulgeyko
Keyword(s):  
Friction Coefficient ◽  
Penetration Depth ◽  
Contact Interaction ◽  
Coefficient Of Friction ◽  
Analytical Determination ◽  
Depth Of Penetration ◽  
Hardening Treatment ◽  
The Coefficient Of Friction ◽  
Deformation Component

The main factors of the process of diamond smoothing are considered in the work: the force of the contact interaction of the tool and the part in the deformation zone and the friction on the contact surface of the part and the smoother. The technique of analytical determination of the optimal smoothing force for the finishing-hardening treatment mode is presented. The calculated values were obtained for some characteristic grades of materials of small and medium hardness (≤ 210 HB, indenter radius 3.4 mm) and a number of hardened steels of high hardness (indenter radius 2.0 mm). The force values are also determined using expressions for the deformation component of the friction coefficient. A comparative analysis of the results indicates that the calculation options are adequate for practical purposes. On specific examples of processed materials, graphical dependencies are shown, which reflect the relationship between the coefficient of friction, including its deformation component, and the smoothing force. With an increase in the leveling force, the friction coefficient increases, this is explained by an increase in the depth of penetration of the diamond tip and, consequently, an increase in the deformation component. The depth of penetration of the indenter into the surface to be treated, and therefore the coefficient of friction during ironing, depends on the hardness of the material being processed. With increasing hardness, the penetration depth decreases, which leads to a decrease in the deformation component and in general the coefficient of friction. The friction coefficient is also affected by the radius of the working part of the tool, since the indenter penetration depth also depends on its value. The research results can be used in the development of technology for finishing and hardening diamond smoothing, the development of the process and its introduction into production.

Development of a Method for Determining the Main Parameters of the Percolation Process in Antistatic Composite Polymer Materials

2021 ◽  
Vol 899 ◽  
pp. 392-397
Author(s):  
Diana V. Volnova ◽  
Ekaterina S. Tsobkallo ◽  
Galina P. Meshcheryakova ◽  
Olga A. Moskalyuk
Keyword(s):  
Composite Materials ◽  
Percolation Threshold ◽  
Polymer Composites ◽  
Electrical Resistance ◽  
Carbon Nanoparticles ◽  
Axial Ratio ◽  
Polymer Materials ◽  
Thermoplastic Polymer ◽  
Composite Polymer ◽  
Percolation Process

Polymer composite materials based on thermoplastic polymer and carbon nanoparticles with different axial ratio were obtained by melt technology. The values of the electrical resistance of polymer composites have been determined. Development of a methodology for assessing the parameters of the percolation process: the percolation threshold and the required resistance values of the polymer, to obtain a material with antistatic properties.

The study on coffee biomass composite materials and their application on green golf grip

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040009
Author(s):  
Chen-Feng Kuan ◽  
Chin-Lung Chiang ◽  
Ming-Yuan Shen ◽  
Hsu-Chiang Kuan
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Coefficient Of Friction ◽  
Carbon Footprint ◽  
Golf Club ◽  
Low Carbon ◽  
Toughening Mechanism ◽  
The Coefficient Of Friction ◽  
Market Requirement ◽  
Thermoplastic Rubber

In this study, we combine the biodegradable plastic with petrochemical plastics to prepare a biomass elastomer. In addition to the energy saving and carbon footprint reduction, it is safer than traditional one. A biomass Polylactide (PLA) and coffee slag were blended with thermoplastic rubber (TPR), and an environmentally friendly, low-carbon-footprint golf club grip was prepared. The product has higher deodorization ability than traditional one and is comfortable as well. The recipes design, coupling and toughening mechanism, and compounding technology are discussed in this study. The resulted PLA/TPR/coffee composite has tensile strength 213.6 kgf/cm2, which is higher than TPR of 181.0 kgf/cm2. The coefficient of friction (COF) is 4 kg and hardness is Shore A 56, furthermore, it can deodorize 85% ammonia within 2 h, which fits the market requirement.

Tribological Behavior of Polymer Seal Materials in Water-Based Hydraulic Fluids

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
S. Bernat ◽  
A. Brink ◽  
M. Lucas ◽  
N. Espallargas
Keyword(s):  
Water Content ◽  
Coefficient Of Friction ◽  
Polymer Materials ◽  
Elastic Behavior ◽  
Hydraulic Fluid ◽  
Steady Growth ◽  
Hydraulic Fluids ◽  
Water Based ◽  
The Coefficient Of Friction ◽  
Materials Used

In this work, two polymer materials have been tested in a lubricated reciprocating pin-on-plate contact geometry using water-based hydraulic fluids to simulate sliding conditions of seal materials used in offshore equipment. The effect of load, speed, water content of the lubricant, and soaking of the ultra-high molecular weight polyethylene (UHMWPE) and a polyketone (PK) sliding against a super-duplex stainless steel (SDSS) was studied. The results showed that for UHMWPE, an increase in normal force leads to a decrease in coefficient of friction for all velocities. While under the same sliding conditions, no relevant influence of load on friction coefficient was found for PK. On the other hand, an increase in sliding speed decreased the coefficient of friction for both materials. The effect of the water content of the hydraulic fluid on the tribological performance was also studied. In UHMWPE-SDSS system, increasing water content in the hydraulic fluid resulted in steady growth of the transfer film. One reason for this might be the decreasing lubricant viscosity, which moves the system toward the boundary lubrication regime. In addition, it was found that the incubation of both UHMWPE and PK in water-based lubricants showed a beneficial effect on friction and wear, which was explained by the change in polymer visco-elastic behavior.

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