Creation of Oil-Filled Composites of Tribotechnical Purpose Based on Aromatic Polyamide Phenylone C-2

Abstract

The authors of the paper suggested a recently developed technology of creating oil-filled composites based on aromatic polyamide Phenylone C-2. The depicted approach originates in the functional modification of the matrix base with nanomodified fillers and nanodimensional additives. The paper formulated the principles of absorption modification of mineral nanofiller for creating universal inhibitors of tribosystem or oleaginous polymer, more known as «maslyanit». It was demonstrated that the efficiency of polymer filling is enhanced by the joint application of the methods of preliminary solvent cleaning and dispersion of mineral particles to the nanodispersed state. The increase of the sorption capacity of natural and synthetic minerals was carried out by acid modification of minerals. A set of comparative tribological tests on a friction machine of Amsler II 5018 type according by a «finger-roller» scheme without external lubrication was carried out to evaluate the resistance of composite materials to abrasion at a constant specific pressure. It was found that the introduction of PFPE oil led to a significant decrease of the coefficient of friction practically in the entire loading range only in composites containing Aerosil. While the introduction of PMPS oil, in contrast, strengthened the antifriction effect of the samples, containing spinel and serpentine, in the load range of 209-720 N. The study of physical and mechanical properties of composites was carried out by NanoTest 600 complex. It was established that the samples with the addition of Arimid are characterized with the highest physical and mechanical properties. Besides, it as noted that the addition of PFPE and PMPS oils when creating oil-filled composites results in 20-25% decrease the microhardness and modulus of elasticity values. The carried out researches allowed concluding that the composite with that composition is most suitable for use in non-lubricated friction units.

Determining the influence of a filler on the properties of composite materials based on Phenylone C2 for tribojunctions in machines and assemblies

“…11). Unlike [10], where in order to reduce the friction coefficient of PCM based on C2, it was necessary to carry out complex and energy-intensive preparation of the filler, this result can be achieved by the introduction of TEG, without prior preparation. This is explained by the fact that with the wear of PCM, TEG from its structure, falling on the counter body, reduces the coefficient of friction, and when a certain concentration of graphite is reached, its stabilization is observed.…”

“…An option to overcome difficulties in reducing the coefficient of friction and ensuring the necessary physical and mechanical characteristics may be to design oil-filled PCM. This approach is used in [10]. Studies have found that the introduction of an absorbingly modified mineral nanofiller and lubricant into the composition of Phenylone C2 leads to a decrease in the coefficient of friction in a wide range.…”

Development of Self-lubricating Polymeric Composites Based on PTFE

“…Recently, a promising direction is the development of oil-filled polymer composites [14][15][16]. Antifriction self-lubricating composite materials under the brand name "Maslyanit" are known [17][18][19]. Using polymers of various classes as the basis of the material, especially polyamides, introducing multifunctional fillers and additives into the polymer-plasticizer-lubricant system, it was possible to create more than 50 "Maslyanit" modifications with various physical, mechanical, thermophysical, tribological and special properties [20].…”

Modeling Stress Deformed State Upon Contact with the Bodies of Two-Phase Microstructure

“…Thus, the calculation of the tensor matrix of the elastic moduli of a composite was reduced to the definition of two independent constants: С1111, С1122 on which the required modules dr dr K , µ were determined. In the calculations, it was assumed that the matrix of the composite is made of aromatic polyamide of phenyl brand C-2, having a Young's modulus E = 4975 [MPa] and a Poisson ratio ν=0.34, which were determined experimentally [4].…”

“…As a rule, such materials work in friction units only if there are lubricants and oils in the contact zone, however, in the absence of tightness of the components, the requirements for environmental protection are violated, which makes the use of lubricants limited. A promising is an oil-filled composite material with nanoparticles [3], which has a wide range of physicomechanical and tribological properties, and is operable in friction assemblies without lubrication [4,5]. In order to study the physicomechanical and tribological properties of this composite, it is necessary to carry out a refined analysis of the stress-strain state under the conditions of tribological contact.…”