The effect of irradiated PTFE on the friction and wear behavior of chemically bonded PA46-PTFE-cb and PA66-PTFE-cb compounds

Kamga, Lionel Simo; Nguyen, Thanh-Duong; Emrich, Stefan; Oehler, Manuel; Schmidt, Thomas; Gedan-Smolka, Michaela; Kopnarski, Michael; Sauer, Bernd

doi:10.1016/j.wear.2022.204380

Cited by 11 publications

(17 citation statements)

References 22 publications

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“…As a part of DFG‐project SPP2074, this work aims to perform a novel chemically bonded solid lubricant based on PA, PTFE, and oil molecules. The concept of dry/solid lubrication is shown in Figure 1a 4 . The tribosystem consists of three components: the PA‐PTFE‐oil‐cb compounds as a solid lubricant, a steel disc, and a bronze disc.…”

Section: Introductionmentioning

confidence: 99%

“…Concept of solid lubrication based on PTFE compounds (a) model of a tribosystem (adapted from Simo Kamga et al 4 ), (b) PA‐PTFE‐pm compound as a lubricant (adapted from Ter Hell plastics GmbH 5 ), and (c) PA‐PTFE‐oil‐cb compound as a lubricant. PA, polyamide, PTFE, polytetrafluoroethylene [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

“…The concept of dry/solid lubrication is shown in Figure 1a. 4 The tribosystem consists of three components: the PA-PTFE-oil-cb compounds as a solid lubricant, a steel disc, and a bronze disc. The compounds will be pressed on the driving steel disc.…”

mentioning

confidence: 99%

“…Different studies have shown that compounds based on PA and radiation-modified PTFE micro powders can enhance tribological properties. [6][7][8] PTFE demonstrates a wide application temperature range (from À250 to 270 C), high-chemical resistance, and excellent anti-adhesion properties, resulting in a low coefficient of friction under tribological conditions. 9 Simultaneously, PTFE cannot be processed according to standard thermoplastic processes and does not exhibit good wear resistance.…”

mentioning

confidence: 99%

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Chemically bonded PA‐PTFE‐oil compounds by reactive processing: Chemical, thermal, morphological, and mechanical analysis

Nguyen

Schmidt

Meißner

et al. 2022

J of Applied Polymer Sci

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In this research, the novel materials based on polyamide (PA), polytetrafluoroethylene (PTFE), and olefinic oil molecules are produced as a solid lubricant in metal‐plastic sliding contacts or sacrificial elements in metal–metal sliding contacts. For these applications, high durability of the compound material combined with low wear is required for long‐term use under high friction and mechanical loads. Earlier studies of IPF have shown that chemical bonding between the polymer matrix and the solid lubricant is mandatory to meet these requirements. For this purpose, the compounds are fabricated by a novel two‐step reactive processing procedure based on radiation‐modified PTFE, which exhibits reactive‐functional groups (COOH) and persistent perfluoroalkyl‐(peroxy)‐radicals (COO·). The PA‐PTFE‐oil‐cb compound materials (cb: chemically bonded) are analyzed by differential scanning calorimetry (DSC) concerning breaking down behavior and Fourier‐transform infrared spectroscopy with regards to the chemical covalent bonding state between the three components. Results of scanning electron microscopy investigations in correlation with DSC show that chemical bonding between PA and PTFE‐oil‐cb leads to a homogeneous distribution of solid lubricant particles in the three various PA matrices. Due to the chemical coupling, the compounds offer almost comparable or improved mechanical properties in the case of toughness compared to non‐modified PA.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Chemically bonded PA‐PTFE‐oil compounds by reactive processing: Chemical, thermal, morphological, and mechanical analysis

Nguyen

Schmidt

Meißner

et al. 2022

J of Applied Polymer Sci

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“…32 Conventionally, irradiation treatment technology which bears the advantages of cleanliness and high efficiency has been widely adopted in industrial sectors to modify the properties of polymer substrates, especially in terms of PTFE. [33][34][35][36] Kamga et al 37 prepared polyamide (PA)-based composites which were modified using irradiation treated PTFE. The results indicated that using irradiation treated PTFE as solid lubricant resulted in lower friction coefficient and wear rate.…”

Section: Introductionmentioning

confidence: 99%

Improving the tribological performance of polyphenylene sulfide by incorporating irradiation treated polytetrafluoroethylene powders

Mei

Peng

et al. 2023

J of Applied Polymer Sci

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In this work, the efficacy of using irradiation treated polytetrafluoroethylene (i.e., i-PTFE) powders on the tribological properties of polyphenylene sulfide (PPS)-based composites was systematically investigated. The results showed that the addition of i-PTFE powders significantly improved the friction and wear properties of PPS. The average friction coefficient and specific wear rate of PPS/i-PTFE 20 wt% composite reached 0.129 and 1.75 Â 10 À5 mm 3 N À1 m À1 , which were 77.4% and 99.5% lower than those of pure PPS, respectively. SEM observations indicated that the i-PTFE powders exhibited a relatively uniform distribution within PPS, which favored the formation of intact, uniform and continuous transfer film on the surface of friction pair, thereby resulting in a significant improvement of tribological properties for PPS/i-PTFE composites. The worn surface of the testing specimen turned smoother and the wear debris became smaller with increasing addition of i-PTFE powders, which was related to the improvement of tribological performance by forming transfer film at the sliding interface. This work provided a strategy to fabricate high performance self-lubricating polymer composites that demonstrate potential applications in engineering sectors.

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

Lin

Wang

et al. 2023

Polymer Composites

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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.

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The effect of irradiated PTFE on the friction and wear behavior of chemically bonded PA46-PTFE-cb and PA66-PTFE-cb compounds

Cited by 11 publications

References 22 publications

Chemically bonded PA‐PTFE‐oil compounds by reactive processing: Chemical, thermal, morphological, and mechanical analysis

Chemically bonded PA‐PTFE‐oil compounds by reactive processing: Chemical, thermal, morphological, and mechanical analysis

Improving the tribological performance of polyphenylene sulfide by incorporating irradiation treated polytetrafluoroethylene powders

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

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