Structure of fluoropolymer products prepared from solutions of tetrafluoroethylene telomers

Bouznik, V. M.; Ignatieva, L. N.; Kaidalova, T. A.; Kim, I. P.; Kiryukhin, D. P.; Kuryavyi, V. G.; Савченко, Н. Н.; Slobodyuk, A. B.

doi:10.1134/s0965545x08090058

Cited by 13 publications

(8 citation statements)

References 2 publications

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“…Moreover, the absorption peaks at 634 and 502 cm À1 belonged to the bending vibration of CF 2 group, and the absorption peak at 994 cm À1 corresponded to CF 3 group. [39][40][41] The above results suggested that the characteristic absorption peaks of PTFE were observed in both types of fillers. However, there was a slight discrepancy between the FTIR spectra for both fillers.…”

Section: Characterization Of Ptfe Powdersmentioning

confidence: 62%

“…The worn surface of (a) pure PPS, (b) PPS/i-PTFE5, (c) PPS/i-PTFE10, (d) PPS/i-PTFE15, (e) PPS/i-PTFE20; the wear debris of (a1) pure PPS, (b1) PPS/i-PTFE5, (c1) PPS/i-PTFE10, (d1) PPS/i-PTFE15, (e1) PPS/i-PTFE20. [Color figure can be viewed at wileyonlinelibrary.com] (1127, 1152, 634 and 502 cm À1 ) [39][40][41] were observed in the wear debris of PPS/i-PTFE20. The above indicated that the formation of PTFE transfer film was crucial to improving the tribological properties and the formed PTFE transfer film could also be scraped off by the shearing action of the sliding friction pair.…”

Section: Wear Mechanismmentioning

confidence: 99%

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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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Section: Characterization Of Ptfe Powdersmentioning

confidence: 62%

Section: Wear Mechanismmentioning

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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“…Figure 2 shows that when the reflections occur from diamond single crystal the PTFE pattern changes. In the range of 2θ = 30-50°, on the border of PTFE and diamond grain, there are intensity of polymer crystallisation peaks on the background of the amorphous halo, typical of heat-treated PTFE (Buznik et al, 2009). Inside the polymer in this field of pattern the signal intensity of the amorphous phase is increasing, against which the signals of the crystallisation peaks are weaken.…”

Section: Resultsmentioning

confidence: 99%

Polyolefins structure formation effected by addition of industrial natural diamond powders

Shitz

Koriakina

2015

IJAT

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Structure investigation of new wear-resistant composite materials based on polyolefins and industrial natural diamond powders are conducted. It is proved by experiments that the structural-phase response of adding the diamond particles with high degrees of fragmentation at perfluorinated and non-fluorinated polyolefins is different. Thus, depending on the qualitative and quantitative composition of the composites and the technological conditions of their production, the polymer forms different structural types -from the band with no apparent supramolecular structures to spherulitic.

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“…It should be noted that the spectral contour of CF vibrational modes recorded in the present study differed from the spectral shape of similar lines found in (Refs. [ 35 , 36 , 37 , 38 ] Figure 1 ). The reason for the discrepancy is that CF bonds are part of different atomic groups present in PTFE macromolecules (-CF 2 , -CF 3 , -CFO, -CF=CF-, etc.…”

Section: Resultsmentioning

confidence: 99%

Thermoradiationally Modified Polytetrafluoroethylene as a Basis for Membrane Fabrication: Resistance to Hydrogen Penetration, the Effect of Ion Treatment on the Chemical Structure and Surface Morphology, Evaluation of the Track Radius

Moskvitin

Koshkina²,

Slesarenko³

et al. 2023

Membranes

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A study of the properties of thermoradiationally modified polytetrafluoroethylene and its importance for use as the basis of polymer membranes is presented. The hydrogen permeability of a TRM-PTFE film was studied in comparison with an original PTFE film, and showed a three-fold decrease in hydrogen permeability. Further, TRM-PTFE films were irradiated with accelerated Xe ions with an energy of 1 MeV with fluences from 1 × 108 to 1 × 1011. The changes induced by ion treatment were analyzed by infrared spectroscopy of disturbed total internal reflection (IR-ATR) and by atomic force microscopy (ASM). IR-ATR indicated the absence of destruction in the fluence range from 1 × 108 to 3 × 1010 cm−2 (in the area of isolated tracks) and the beginning of overlap of latent tracks on fluences from 3 × 1010 to 1 × 1011 cm−2. Topographic images with AFM showed layered lamellar structures that collapsed at a fluence of 108 cm−2. The destruction was accompanied by a decrease in roughness about seven times the size of the track core observed by the ASM method, fully corresponding to the value obtained on the basis of calculations using modeling in an SRIM program.

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Structure of fluoropolymer products prepared from solutions of tetrafluoroethylene telomers

Cited by 13 publications

References 2 publications

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

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

Polyolefins structure formation effected by addition of industrial natural diamond powders

Thermoradiationally Modified Polytetrafluoroethylene as a Basis for Membrane Fabrication: Resistance to Hydrogen Penetration, the Effect of Ion Treatment on the Chemical Structure and Surface Morphology, Evaluation of the Track Radius

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