The effect of PTFE on the mechanical, friction, and wear properties of CF/PMMA composites

Xue-jun, Wang; Chen, Yilin; Yong-sheng, Cao

doi:10.1177/0892705712470264

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…Many researchers have studied the friction and wear behavior of PTFE-filled polymers. [13][14][15][16] It has been reported that high-sliding velocity and loads promote the formation of a compact transfer film at the early stage of contact. This film formation is believed to be the predominant mechanism giving rise to excellent wearresistant performance of the solid lubricants with high load-carrying capacity.…”

Section: Introductionmentioning

confidence: 99%

Physico-mechanical, thermal, and tribological studies of polytetrafluoroethylene-filled polyoxymethylene/silicone composites

Gowda¹,

Hemavathi²,

Srinivas³

et al. 2020

Journal of Thermoplastic Composite Materials

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Polyoxymethylene (POM)-based composites with polytetrafluoroethylene (PTFE) filler and silicone gum have been prepared by melt extrusion to enhance the wear resistance and friction lubrication of POM without compromising the other desired properties such as modulus, toughness/impact strength, notch insensitivity, and thermal stability. The compounded material was injection molded to prepare test specimens, and their physico-mechanical properties were evaluated. In addition, thermal and tribological characteristics of the composites were also studied. The addition of silicone into POM/PTFE composites could enhance the formation of stable transfer film on the mating surface during sliding contact, thus improving the friction and wear performance, as silicone forms synergistic mixture with PTFE. It was found that the tensile, flexural, and notched impact strength remained almost constant for all the formulations. The use of PTFE improved the unnotched impact strength (from 35.5 to 42.9 kJ m−2). The toughening effect can be attributed to the dissipation of impact energy through soft PTFE and ductile silicone phase. Differential scanning calorimeter results revealed that there are no negative effects on POM crystallinity due to the presence of PTFE and silicone. The wear behavior of composites has been investigated under dry sliding conditions at different normal loads and sliding velocities at room temperature. The POM/PTFE/silicone (90/8/2 wt/wt%) formulation exhibits better wear-resistant behavior in the present study.

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Section: Introductionmentioning

confidence: 99%

Physico-mechanical, thermal, and tribological studies of polytetrafluoroethylene-filled polyoxymethylene/silicone composites

Gowda¹,

Hemavathi²,

Srinivas³

et al. 2020

Journal of Thermoplastic Composite Materials

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“…Zhang et al [15] found that the friction coefficient and wear rate of poly(phthalazinone ether sulfone ketone) (PPESK) composite filled with PTFE decreased substantially compared with the neat PPESK. For the carbon fiber (CF)/PMMA composites prepared by physical extrusion, filling PTFE can further reduce friction and wear [16]. The addition of PTFE in polymer matrix helped in the formation of a continuous and uniform transfer film and resulted in a reduction in the friction coefficient [17,18].…”

Section: Introductionmentioning

confidence: 99%

Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE

Zhang

Chen

et al. 2018

Polymers

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Polytetrafluoroethylene/Poly(methyl methacrylate) (PTFE/PMMA) composite was prepared by mixing PTFE into PMMA matrix which synthesized by the PMMA powder mixture and methyl methacrylate (MMA) liquid mixture. The effects of the filling mass ratio of PTFE and powder/liquid (P/L) ratio on the friction and wear properties of PTFE/PMMA composites against bearing steel were studied by a ball-on-disk tribometer. Fourier transform infrared (FTIR), field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDS) were used to characterize the synthesis of PTFE/PMMA composite. The shore hardness and glass transition temperature (Tg) were obtained respectively by shore hardness tester and differential scanning calorimetry (DSC). The results show that the friction coefficient and wear rate of PMMA based composite, comparing with the unfilled PMMA, can be significantly reduced by filling with PTFE. With the increasing of PTFE filling mass ratio, the wear rate of PTFE/PMMA composite increases. The friction coefficient and wear rate of the unfilled PMMA and PTFE/PMMA composite generally decrease with the P/L ratio increasing. The main wear mechanism of the unfilled PMMA is adhesive wear. While the main wear mechanisms of PTFE/PMMA composites are fatigue wear and abrasive wear.

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“…1,[21][22][23] PTFE composite materials are generally prepared by simple dry blending or coating fillers with PTFE. 24 However, such methods lead to inhomogeneous distribution of fillers within PTFE and causes undesirable effect on the properties of PTFE composite membranes. In this regard, aggregation of colloidal particles has gained a large interest and has been employed in the fabrication of PTFE composite particles.…”

Section: Introductionmentioning

confidence: 99%

Polytetrafluoroethylene (PTFE)/carbon black (CB) microporous membranes produced from PTFE/CB composite particles prepared by heterocoagulation process

Zhang

Liu

et al. 2016

High Performance Polymers

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Polytetrafluoroethylene (PTFE)/carbon black (CB) microporous membranes with excellent properties were successfully prepared via heterocoagulation process and mechanical stretching method. Heterocoagulation was achieved using PTFE emulsion with 26% solid content, an intermediate product of the commercial PTFE dispersions with 60% solid content, and CB dispersions to prepare PTFE/CB composite particles by mechanical stirring, which is the unique content in this article. Furthermore, in order to obtain uniform distribution of CB particles within the membrane matrix as well as improve color uniformity and mechanical strength of the microporous membranes, CB was pretreated by a titanate coupling agent (NDZ-201). The PTFE/CB composite particles were then used to prepare the PTFE/CB microporous membranes via mechanical stretching operation. Several important properties of the prepared PTFE/CB microporous membranes, such as tensile strength, porosity, contact angles, morphology, and dynamic mechanical properties, were investigated. Results showed that the fabricated PTFE/CB microporous membranes possessed color uniformity, high tensile strength, and high hydrophobicity.

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The effect of PTFE on the mechanical, friction, and wear properties of CF/PMMA composites

Cited by 10 publications

References 10 publications

Physico-mechanical, thermal, and tribological studies of polytetrafluoroethylene-filled polyoxymethylene/silicone composites

Physico-mechanical, thermal, and tribological studies of polytetrafluoroethylene-filled polyoxymethylene/silicone composites

Significant Reduction of the Friction and Wear of PMMA Based Composite by Filling with PTFE

Polytetrafluoroethylene (PTFE)/carbon black (CB) microporous membranes produced from PTFE/CB composite particles prepared by heterocoagulation process

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