Investigation of the Influence of Complex Fillers on the Properties and Structure of Polytetrafluoroethylene

Vasilev, A. P.; Охлопкова, А. А.; Struchkova, T. S.; Гракович, П. Н.; Bashlakova, A. L.

doi:10.3103/s1068366618050148

Cited by 11 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The oxygen content of stainless steel discs is highest when MP1100 is 24 wt%, with an average of about 6.44%. It can be speculated that MP1100 composite material containing COOH polar groups is easy to have a frictional chemical reaction with Fe and Cr elements in duplex stainless steel to generate carboxylic acid metal‐chelate salt, which contributes to the bonding between transfer film and discs and leads to ultra‐low wear, which is also a conclusion of previous studies 37,64,65 . With an increase in MP1100 in the composite, more oxygen and carbon elements remain on the surface of the duplex stainless steel due to chemical reactions.…”

Section: Resultsmentioning

confidence: 71%

“…It can be speculated that MP1100 composite material containing COOH polar groups is easy to have a frictional chemical reaction with Fe and Cr elements in duplex stainless steel to generate carboxylic acid metal-chelate salt, which contributes to the bonding between transfer film and discs and leads to ultra-low wear, which also a conclusion of previous studies. 37,64,65 With an increase in MP1100 in the composite, more oxygen and carbon elements remain on the surface of the duplex stainless steel due to chemical reactions. When MP1100 is 32 wt%, the agglomerated MP1100 particles reduce the contact area with the duplex stainless steel during friction, reducing the intensity of the tribochemical reaction, thus reducing the content of oxygen and carbon content on the surface of the duplex stainless steel.…”

Section: Results Of Tribological Testingmentioning

confidence: 99%

“…35,36 Secondary structures can be formed on the surface of composite materials during friction, thus reducing material wear. 37 Recent studies have suggested that high-energy radiation (Electron beam, γ ray, and X-ray) may cause PTFE molecules to split or crosslink, resulting in changes in their mechanical and thermal properties. 38 The C C and C F bonds of PTFE are broken, resulting in the production of PTFE micropowders which have a low molecular weight containing polar functional groups ( COF and COOH) and persistent perfluoroalkyl radicals, such as MP1100 and MP1200 micropowders under irradiation at ambient temperature air.…”

Section: Introductionmentioning

confidence: 99%

“…The load acting on the composite matrix can be effectively transferred to the short carbon fiber with excellent properties 35,36 . Secondary structures can be formed on the surface of composite materials during friction, thus reducing material wear 37 …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Lin

Wang

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

A method of improving the tribological properties of hexagonal boron nitride/short carbon fibers/polytetrafluoroethylene (h‐BN/SCFs/PTFE) composites by adding homologous micropowder (MP1100) with polar groups is proposed in this study. Composites of h‐BN/SCFs/PTFE with MP1100 at 0, 8, 16, 24, and 32 wt% were prepared. The pin‐on‐disc device was used to evaluate the friction properties of composites, and wear mechanisms against duplex stainless steel was examined. The experimental results show that MP1100 micropowder improves composite mechanical properties, friction coefficient, and wear resistance of composites. A 78.4% drop in wear rate was measured for 24 wt% MP1100. Such decrease in wear rate is explained based on changes in composite molecular structure, a transfer film formed by the absorption of debris, and the formation of chemically reacted polar group compounds on the steel disc.

show abstract

Section: Resultsmentioning

confidence: 71%

Section: Results Of Tribological Testingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Lin

Wang

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…M. Conte suggested that the use of glass fibers in a PTFE matrix can improve the tribological properties by reducing abrasiveness [8]. Recent studies have further explored how additions of secondary reinforcement phases, such as solid lubricants (graphite flakes or MoS 2 ), nanoparticles, and whiskers, affect the tribological response of the composites [7,[10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Tribological Behavior of Reinforced PTFE Composites and Un-Reinforced Polyketone-Based Materials against Coated Steel

et al. 2021

View full text Add to dashboard Cite

In this study, two polymeric materials were tested in a dry rotating “pin-on-disc” configuration against differently coated surfaces, to evaluate their tribological response under conditions, such as those of rotary lip seals, and to identify the wear mechanism of each coupling. A PTFE based material, reinforced with glass fibers and a solid lubricant, and unreinforced polyketone were tested against a chromium oxide coating deposited by plasma thermal spraying, a CrN/NbN superlattice coating deposited by Physical Vapor Deposition (PVD), and a Diamond-Like Carbon (DLC) coating obtained through a hybrid PVD/PECVD (Plasma-Enhanced Chemical Vapor Deposition) process. The PTFE matrix composite offers better overall performance, in terms of specific wear rates and friction coefficients than polyketone. Although the tribological behavior of this material is generally worse than that of the PTFE matrix composite, it can be used without reinforcing fillers. Our analysis demonstrates the importance of transfer-film formation on the counter-surfaces, which can prevent further wear of the polymer if it adheres well to the counterpart. However, the tribofilm has opposing effects on the friction coefficient for the two materials: its formation leads to lower friction for PTFE and higher friction for polyketone.

show abstract

Influence of a hybrid complex of fillers including olivinite and magnesium spinel on the structure and properties of polytetrafluoroethylene

et al. 2023

View full text Add to dashboard Cite

Investigation of the Influence of Complex Fillers on the Properties and Structure of Polytetrafluoroethylene

Cited by 11 publications

References 7 publications

Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Tribological Behavior of Reinforced PTFE Composites and Un-Reinforced Polyketone-Based Materials against Coated Steel

Influence of a hybrid complex of fillers including olivinite and magnesium spinel on the structure and properties of polytetrafluoroethylene

Contact Info

Product

Resources

About