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Journal articles on the topic 'Reinforced polytetrafluoroethylene'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Vail, J. R., B. A. Krick, K. R. Marchman, and W. Gregory Sawyer. "Polytetrafluoroethylene (PTFE) fiber reinforced polyetheretherketone (PEEK) composites." Wear 270, no. 11-12 (2011): 737–41. http://dx.doi.org/10.1016/j.wear.2010.12.003.

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2

Okhlopkova, A. A., S. V. Vasil’ev, P. N. Petrova, and O. V. Gogoleva. "Frictional basalt-reinforced polymers based on polytetrafluoroethylene." Russian Engineering Research 36, no. 4 (2016): 285–88. http://dx.doi.org/10.3103/s1068798x16040134.

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3

Schuman, Earl S., Blayne A. Standage, John W. Ragsdale, and George F. Gross. "Reinforced versus nonreinforced polytetrafluoroethylene grafts for hemodialysis access." American Journal of Surgery 173, no. 5 (1997): 407–10. http://dx.doi.org/10.1016/s0002-9610(97)00063-9.

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4

Wang, Xiao, Junwei Wu, Luhai Zhou, Xicheng Wei, and Wurong Wang. "Tribological behaviors of amino functionalized graphene reinforced PTFE composite." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 11 (2018): 1428–36. http://dx.doi.org/10.1177/1350650117754000.

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Graphene was successfully modified by amino-functionalization process. The Fourier transform-infrared spectroscopy, Raman spectroscopy, and X-ray diffractometer were used to characterize the amino-functionalization result. The transmission electron microscopy was used to visualize the morphology of graphene and fractured surface of its resulting composite. The tribological behaviors of amino functionalized graphene reinforced polytetrafluoroethylene composite were evaluated by using a face-to-face contact mode under dry sliding/water lubricated condition. The worn surface was characterized by using a scanning electronic microscope equipped with an energy dispersive spectroscopy in order to find the reasons for the better tribological behaviors. The anti-friction and anti-wear mechanisms of amino functionalized graphene reinforced polytetrafluoroethylene composite were elucidated based on the experimental results. In all, this work is hoped to be helpful in designing and researching a new industrial material which can be used for water lubricated conditions in new-energy-vehicle fields.

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5

Lien, Wan-Fu, Wen-Cheng Liaw, Po-Chen Huang, Hsiao-Ling Chang, and Huang-Shian Tsai. "Preparation of glass fiber clothes reinforced polytetrafluoroethylene film composites using plasma for polytetrafluoroethylene surface modification." Journal of Polymer Research 18, no. 4 (2010): 773–80. http://dx.doi.org/10.1007/s10965-010-9474-5.

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6

Oshima, A. "Radiation processing for carbon fiber-reinforced polytetrafluoroethylene composite materials." Radiation Physics and Chemistry 60, no. 1-2 (2001): 95–100. http://dx.doi.org/10.1016/s0969-806x(00)00321-2.

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7

Burya, A. I., S. V. Kalinichenko, G. A. Baglyuk, and A. S. Redchuk. "Research of structure and properties polytetrafluoroethylene reinforced fiber arselon." Polymer journal 39, no. 3 (2017): 171–76. http://dx.doi.org/10.15407/polymerj.39.03.171.

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8

Mei, Shunqi, Oksana Ayurova, Undrakh Mishigdorzhiyn, et al. "Structure and Properties of Self-Reinforced Polytetrafluoroethylene-Based Materials." Polymers 17, no. 12 (2025): 1609. https://doi.org/10.3390/polym17121609.

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A promising direction in polymer material processing is the development of self-reinforced polymer composites (SRPMs), representing a relatively new group of composite materials. The self-reinforcement method allows for materials of one polymer to be combined with different molecular, supramolecular, and structural features. The high adhesive and mechanical properties of SRPMs are due to the formation of a homogeneous system with no inter-phase boundary. Moreover, self-reinforcement considers the possibility of using polymer waste to create high-strength composites, which reduces the environmental load. In the current work, the phase composition, structure, and properties of SRPMs based on polytetrafluoroethylene (PTFE) were studied. SRPMs were prepared by mixing industrial and regenerated PTFE powders and then subjected to pressing and sintering. Two types of regenerated PTFE were used for the SRPM preparation: a commercial PTFE of the TOMFLONTM trademark and mechanically grinded PTFE waste. The degree of crystallinity of the obtained materials (41–68%) was calculated by XRD analysis; the crystallite size was determined to be 30–69 nm. Thermal analysis of the composites was carried out by the DSC method in the temperature range of 25–370 °C. The characteristics of thermal processes in self-reinforced composites correlate with the data from structural studies of XRD and FTIR analyses. The results of dynamic mechanical analysis showed that the introduction of regenerated PTFE powder into an industrial one increased the elasticity modulus from 0.6 GPa up to 2.0–3.1 GPa. It was shown that the phase state of the SRPMs depended on the method of processing polymer waste (the type of regenerated PTFE) that determined the heat resistance and mechanical properties of the obtained composite material.

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9

Mu, Liwen, Jiahua Zhu, Jingdeng Fan, et al. "Self-Lubricating Polytetrafluoroethylene/Polyimide Blends Reinforced with Zinc Oxide Nanoparticles." Journal of Nanomaterials 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/545307.

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ZnO nanoparticle reinforced polytetrafluoroethylene/polyimide (PTFE/PI) nanocomposites were prepared and their corresponding tribological and mechanical properties were studied in this work. The influences of ZnO loading, sliding load, and velocity on the tribological properties of ZnO/PTFE/PI nanocomposites were systematically investigated. Results reveal that nanocomposites reinforced with 3 wt% ZnO exhibit the optimal tribological and mechanical properties. Specifically, the wear loss decreased by 20% after incorporating 3 wt% ZnO compared to unfilled PTFE/PI. Meanwhile, the impact strength, tensile strength, and elongation-at-break of 3 wt% ZnO/PTFE/PI nanocomposite are enhanced by 85, 5, and 10% compared to pure PTFE/PI blend. Microstructure investigation reveals that ZnO nanoparticles facilitate the formation of continuous, uniform, and smooth transfer film and thus reduce the adhesive wear of PTFE/PI.

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10

Oshima, Akihiro, Akira Udagawa, and Yousuke Morita. "Application of radiation-crosslinked polytetrafluoroethylene to fiber-reinforced composite materials." Radiation Physics and Chemistry 60, no. 4-5 (2001): 467–71. http://dx.doi.org/10.1016/s0969-806x(00)00416-3.

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11

Peng, Shiguang, Yue Guo, Guoxin Xie, and Jianbin Luo. "Tribological behavior of polytetrafluoroethylene coating reinforced with black phosphorus nanoparticles." Applied Surface Science 441 (May 2018): 670–77. http://dx.doi.org/10.1016/j.apsusc.2018.02.084.

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12

Ünlü, B. S., M. Uzkut, A. M. Pinar, and K. Özdin. "Microstructural Properties of Particle-Reinforced Polytetrafluoroethylene Composite Bearings After Wear." Materials Science 51, no. 2 (2015): 194–99. http://dx.doi.org/10.1007/s11003-015-9828-6.

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13

Kambayashi, J., Y. Tsuji, M. Danno, T. Ohshiro, and T. Mori. "Left gastric venous caval shunt with externally reinforced polytetrafluoroethylene graft." British Journal of Surgery 75, no. 9 (1988): 886–87. http://dx.doi.org/10.1002/bjs.1800750919.

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14

Yao, Chenghao, Jingyang Lin, and Shuai Zhang. "Polyhexanide derivatives-reinforced silver-polytetrafluoroethylene coatings for enhanced antibacterial properties." Next Materials 8 (July 2025): 100541. https://doi.org/10.1016/j.nxmate.2025.100541.

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15

Zhang, Mi, Zili Zhou, Jiahao Yun, et al. "Effect of Different Membranes on Vertical Bone Regeneration: A Systematic Review and Network Meta-Analysis." BioMed Research International 2022 (July 14, 2022): 1–16. http://dx.doi.org/10.1155/2022/7742687.

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This study is aimed at performing a systematic review and a network meta-analysis of the effects of several membranes on vertical bone regeneration and clinical complications in guided bone regeneration (GBR) or guided tissue regeneration (GTR). We compared the effects of the following membranes: high-density polytetrafluoroethylene (d-PTFE), expanded polytetrafluoroethylene (e-PTFE), crosslinked collagen membrane (CCM), noncrosslinked collagen membrane (CM), titanium mesh (TM), titanium mesh plus noncrosslinked (TM + CM), titanium mesh plus crosslinked (TM + CCM), titanium-reinforced d-PTFE, titanium-reinforced e-PTFE, polylactic acid (PLA), polyethylene glycol (PEG), and polylactic acid 910 (PLA910). Using the PICOS principles to help determine inclusion criteria, articles are collected using PubMed, Web of Science, and other databases. Assess the risk of deviation and the quality of evidence using the Cochrane Evaluation Manual, and GRADE. 27 articles were finally included. 19 articles were included in a network meta-analysis with vertical bone increment as an outcome measure. The network meta-analysis includes network diagrams, paired-comparison forest diagrams, funnel diagrams, surface under the cumulative ranking curve (SUCRA) diagrams, and sensitivity analysis diagrams. SUCRA indicated that titanium-reinforced d-PTFE exhibited the highest vertical bone increment effect. Meanwhile, we analyzed the complications of 19 studies and found that soft tissue injury and membrane exposure were the most common complications.

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16

Li, Zhen Hua, Rui Ya Rong, Yun Xuan Li, and Jian Li. "Effect of Fiber Length on Mechanical Properties of Short Carbon Fiber Reinforced PTFE Composites." Advanced Materials Research 311-313 (August 2011): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.193.

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Carbon fiber reinforced composites have all the ideal properties, leading to their rapid development and successful use for many applications over the last decade. In this paper, short carbon fiber reinforced Polytetrafluoroethylene (SCF/PTFE) composite were prepared with melt blending and hot-pressing techniques. The mechanical properties of this composite were investigated taking into account the combined effect of mean fiber length. Finally it can be shown that an increase in fiber length can enhance the mechanical properties of CF/PTFE composites. The fracture surface of PTFE composite was examined by SEM, to identify the topography of outside force.

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17

Trajkovski, Ana, Nejc Novak, Jan Pustavrh, Mitjan Kalin, and Franc Majdič. "Performance of Polymer Composites Lubricated with Glycerol and Water as Green Lubricants." Applied Sciences 13, no. 13 (2023): 7413. http://dx.doi.org/10.3390/app13137413.

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The study analysed the tribological performance of five different polymer composites: polyetheretherketone reinforced with 30% carbon fibres—PEEK CF30, polyetheretherketone reinforced with 10% carbon fibres, 10% graphite and 10% polytetrafluoroethylene—PEEK MOD, polytetrafluoroethylene reinforced with 25% carbon fibres—PTFE CF25, polyoxymethylene with 30% carbon fibres—POM CF30 and ultra-high molecular weight polyethylene—UHMW PE. The polymers were tested under the sliding regime of a reciprocating stainless-steel ball on a polymer disc, with test parameters expected for hydraulic valves. Two environmentally safe lubricants were used: glycerol and water. The selected polymer materials and their tribological properties were compared based on the coefficient of friction and the specific wear rate. The worn surfaces were examined using scanning electron microscopy, and the transfer film was analysed using the energy dispersive spectroscopy technique. When tested in glycerol, a comparable and low coefficient of friction was measured for all polymers (~0.02). At the same time, a significantly lower coefficient was measured for all polymers in glycerol compared to water-lubricated conditions (~0.06–0.22). The polymers differed in the measured specific wear rate, which increases significantly in water for all polymers. A lower specific wear rate was measured for three polymers with higher microhardness: PEEK CF30, PEEK MOD and POM CF30. In water, PEEK CF30 showed superior tribological properties under harsh conditions but was well followed by POM CF30, which showed the most intense transfer film.

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18

Dong, Tingting, Yiming Zhang, Mingming Yu, Xulan Zhang, and Pibo Ma. "Surface performance of weft‐knitted fabric composites reinforced with polytetrafluoroethylene fibers." Journal of Applied Polymer Science 139, no. 13 (2021): 51864. http://dx.doi.org/10.1002/app.51864.

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19

Zuo, Zhen, Laizhou Song, and Yulin Yang. "Tribological behavior of polyethersulfone-reinforced polytetrafluoroethylene composite under dry sliding condition." Tribology International 86 (June 2015): 17–27. http://dx.doi.org/10.1016/j.triboint.2015.01.019.

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20

Park, Eun-Soo. "Processibility and mechanical properties of micronized polytetrafluoroethylene reinforced silicone rubber composites." Journal of Applied Polymer Science 107, no. 1 (2007): 372–81. http://dx.doi.org/10.1002/app.27065.

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21

Niu, Yong Ping, Xiang Yan Li, Jun Kai Zhang, Ming Han, and Yong Zhen Zhang. "Tribological Behavior of PTFE Nanocomposites Reinforced with PBA Grafted Alumina Nanoparticles." Applied Mechanics and Materials 184-185 (June 2012): 1380–83. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.1380.

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Polybutyl acrylate (PBA) grafted alumina nanoparticles were synthesized. Polytetrafluoroethylene (PTFE) nanocomposites reinforced with PBA grafted nanoparticles were prepared by compression molding. The effects of PBA grafted nanoparticles on the tribological behavior of the PTFE nanocomposites were investigated on a tribometer. The abrasion mechanisms of the PTFE nanocomposites were investigated by scanning electron microscopy (SEM) of the abraded surfaces. The results show that the addition of PBA grafted nanoparticles maintains low friction coefficient and improves the wear resistance of the PTFE nanocomposites.

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22

Islam, M. T., and M. Samsuzzaman. "Miniaturized Dual Band Multislotted Patch Antenna on Polytetrafluoroethylene Glass Microfiber Reinforced for C/X Band Applications." Scientific World Journal 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/673846.

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This paper introduces a new configuration of compact, triangular- and diamond-slotted, microstrip-fed, low-profile antenna for C/X band applications on polytetrafluoroethylene glass microfiber reinforced material substrate. The antenna is composed of a rectangular-shaped patch containing eight triangles and two diamond-shaped slots and an elliptical-slotted ground plane. The rectangular-shaped patch is obtained by cutting two diamond slots in the middle of the rectangular patch, six triangular slots on the left and right side of the patch, and two triangular slots on the up and down side of the patch. The slotted radiating patch, the elliptical-slotted ground plane, and the microstrip feed enable the matching bandwidth to be widened. A prototype of the optimized antenna was fabricated on polytetrafluoroethylene glass microfiber reinforced material substrate using LPKF prototyping machine and investigated to validate the proposed design. The simulated results are compared with the measured data, and good agreement is achieved. The proposed antenna offers fractional bandwidths of 13.69% (7.78–8.91 GHz) and 10.35% (9.16–10.19 GHz) where S11< −10 dB at center frequencies of 8.25 GHz and 9.95 GHz, respectively, and relatively stable gain, good radiation efficiency, and omnidirectional radiation patterns in the matching band.

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23

Kolesnikov, V. I., V. V. Bardushkin, and A. P. Sychev. "OPERATIONAL ELASTIC PROPERTIES OF CHAOTICALLY REINFORCED TRIBOCOMPOSITES." World of Transport and Transportation 15, no. 2 (2017): 38–46. http://dx.doi.org/10.30932/1992-3252-2017-15-2-4.

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[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].The research of V. I. Kolesnikov and A. P. Sychev was carried out thanks to the grant of the Russian Science Foundation (project No. 14-29-00116) at Rostov State Transport University. ABSTRACT The problem of predicting the operational elastic properties of composites based on binders with a high content of epoxy groups (the grade of EPAF and its modification), chaotically reinforced with short polyimide (or glass) fibers with antifriction disperse additives of polytetrafluoroethylene was solved. Numerical model calculations of the effective elastic characteristics (Young’s modulus and Poisson’s ratio) of these tribocomposites were made taking into account changes in the concentrations of their components. Keywords: transport engineering, modeling, tribocomposite, inclusion, epoxy binder, effective elastic moduli.

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24

Isaev, M.V., O.B. Kaliuzhnyi, and V.Ya. Platkov. "Expansion of the temperature range of operation of filter materials based on polytetrafluoroethylene by reinforcing the polymer matrix." Engineering of nature management, no. 4(22) (December 2, 2021): 7–12. https://doi.org/10.5281/zenodo.6964492.

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In order to increase the stability of the pore space of porous polytetrafluoroethylene (PTFE) at ele-vated temperatures, composites based on commercial PTFE have been prepared. Highly refined MG-1 graphite and activated carbon powder were used as reinforcing materials. Deformation curves and hardness values of HRB PTFE and composites based on it were obtained. A technological process of the production of porous composites based on PTFE with a polymer matrix reinforced with graphite MG-1 has been developed. The sodium chloride was used as a porogen, which was removed from the semi-finished products by leaching for the production of bulk porous composites with open porosity and controlled pore structure. The porous materials based on PTFE with a porosity of  and porous PTFE-based compo-sites reinforced with graphite with the same porosity, were obtained.Optical microscopic studies of porous PTFE and porous composite based on PTFE reinforced with graphite showed the identity of their pore structures. A method is proposed for assessing the homogeneity of pore structures by means of multiple measurements of microhardness in various areas of porous polymers. It was found that the developed technological process for production of porous PTFE and a porous composite based on PTFE reinforced with graphite ensures the formation of homogeneous pore structures. The values of the microhardness of porous PTFE have been obtained. The graphite reinforcement of the polymer matrix is shown to decreas the elasticity and increas the strength of their interpore parti-tions. This made it possible to obtain filter materials capable of maintaining the specified parameters of the pore structure and operating reliably at elevated temperatures up to 250С.

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25

Masalehdan, Tahereh, Mehdi Eskandarzade, Abolfazl Tutunchi, et al. "Two-dimensional clay nanosheet-reinforced polytetrafluoroethylene composites and their mechanical/tribological studies." Materials Today Communications 26 (March 2021): 102026. http://dx.doi.org/10.1016/j.mtcomm.2021.102026.

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26

Liu, ShangBao, Hongying Gong, Yong Qian, JiangBo Zhao, Hengchang Ye, and Zhiqiang Zhang. "The friction and wear performance of polytetrafluoroethylene coating reinforced with modified graphene." Materials Today Communications 31 (June 2022): 103448. http://dx.doi.org/10.1016/j.mtcomm.2022.103448.

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27

Demirci, Mehmet Turan, and Hayrettin Düzcükoğlu. "Wear behaviors of Polytetrafluoroethylene and glass fiber reinforced Polyamide 66 journal bearings." Materials & Design 57 (May 2014): 560–67. http://dx.doi.org/10.1016/j.matdes.2014.01.013.

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28

Davari, M., and M. Hashemzadeh. "The effect of bronze particles on CO2 laser cutting of reinforced polytetrafluoroethylene." International Journal of Advanced Manufacturing Technology 96, no. 9-12 (2018): 4029–39. http://dx.doi.org/10.1007/s00170-018-1856-6.

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29

Vasilev, Andrey, Aitalina Okhlopkova, Tatyana Struchkova, Aleksey Alekseev, and Nadezhda Lazareva. "Tribological Properties of Polytetrafluoroethylene with Mechanically Activated Carbon Fibers and Zirconium Dioxide." Tribology in Industry 47, no. 7 (2025): 137–50. https://doi.org/10.24874/ti.1870.01.25.03.

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This paper presents an investigation into the mechanical and tribological properties of PTFE composites reinforced with mechanically activated carbon fibers (5-15 wt.%) and nano-sized zirconium dioxide (1 wt.%) under self-mated contact conditions using a pin-on-disk tribometer. Mechanical tests reveal that incorporating mechanically activated carbon fibers, with or without zirconium dioxide, into PTFE increases compressive strength by 57-71% and Shore D hardness by 17-21% compared to the unfilled polymer. The composite density, measured using the hydrostatic weighing method, decreases with higher filler content (5 to 15 wt.% carbon fibers) regardless of zirconium dioxide inclusion. Tribological tests demonstrate that PTFE reinforced with carbon fibers and nano-sized zirconium dioxide exhibits superior wear resistance compared to composites containing only carbon fibers. However, all composites show higher coefficients of friction and surface roughness Ra than unfilled PTFE under dry sliding conditions. IR spectroscopy reveals the new peaks corresponding to oxygen-containing functional groups, suggesting tribochemical reactions occurring on the worn surfaces. Scanning electron microscopy and optical microscopy were used to analyze the friction surfaces of the polymer matrix and polymer composites and the transfer film formed on the surface of the steel counterbody. In addition, the tribological properties are compared with industrial analog.

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30

Xi, Changqing, Bochao Zhang, Xiangdong Ye, and Honghua Yan. "Fabrication of Polytetrafluoroethylene-Reinforced Fluorocarbon Composite Coatings and Tribological Properties Under Multi-Environment Working Conditions." Polymers 16, no. 24 (2024): 3595. https://doi.org/10.3390/polym16243595.

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Currently, few studies have been conducted on the use of fluorocarbon resin (FEVE) and polytetrafluoroethylene (PTFE) as adhesive substrates and lubricating and anti-corrosion fillers, respectively, for the fabrication of PTFE-reinforced fluorocarbon composite coatings. In this paper, the tribological properties of polytetrafluoroethylene-reinforced fluorocarbon composite coatings were investigated through orthogonal tests under various operating conditions. The optimal configuration for coating preparation under dry friction and aqueous lubrication was thus obtained: the optimal filler particle size, mass ratio of FEVE to PTFE, spraying pressure, and curing agent content were 50 μm, 3:4.5, 0.3 MPa, and 0.3, respectively. Under oil lubrication, the corresponding optimal values were 5 μm, 3:4.5, 0.3 MPa, and 0.3, respectively. Tribological tests revealed that the best overall performance of the FEVE/PTFE coating was obtained when the mass ratio of FEVE to PTFE was 3:4.5, and the filler particle size also significantly affected the tribological properties under different environments, including the friction coefficients of the FEVE/50 μm-PTFE coating under both dry friction and aqueous lubrication, as well as the friction coefficient of the FEVE/5 μm-PTFE coating under oil lubrication. These coefficients were 0.067, 0.062, and 0.055, representing decreases of 86%, 92%, and 56%, respectively, compared to those of the pure FEVE coating under the same working conditions. This research was conducted with the goal of expanding the application of fluorocarbon coatings in the field of tribology.

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31

Guan, Guoping, Chenglong Yu, Meiyi Xing, et al. "Hydrogel Small-Diameter Vascular Graft Reinforced with a Braided Fiber Strut with Improved Mechanical Properties." Polymers 11, no. 5 (2019): 810. http://dx.doi.org/10.3390/polym11050810.

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Acute thrombosis remains the main limitation of small-diameter vascular grafts (inner diameter <6 mm) for bridging and bypassing of small arteries defects and occlusion. The use of hydrogel tubes represents a promising strategy. However, their low mechanical strength and high swelling tendency may limit their further application. In the present study, a hydrogel vascular graft of Ca alginate/polyacrylamide reinforced with a braided fiber strut was designed and fabricated with the assistance of a customized casting mold. Morphology, structure, swellability, mechanical properties, cyto- and hemocompatibility of the reinforced graft were characterized. The results showed that the reinforced graft was transparent and robust, with a smooth surface. Scanning electron microscopic examination confirmed a uniform porous structure throughout the hydrogel. The swelling of the reinforced grafts could be controlled to 100%, obtaining clinically satisfactory mechanical properties. In particular, the dynamic circumferential compliance reached (1.7 ± 0.1)%/100 mmHg for 50–90 mmHg, a value significantly higher than that of expanded polytetrafluoroethylene (ePTFE) vascular grafts. Biological tests revealed that the reinforced graft was non-cytotoxic and had a low hemolysis percentage (HP) corresponding to (0.9 ± 0.2)%. In summary, the braided fiber-reinforced hydrogel vascular grafts demonstrated both physical and biological superiority, suggesting their suitability for vascular grafts.

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32

Yi, Jianya, Zhijun Wang, and Jianping Yin. "Experimental Study on Damage Characteristics of Copper-Reinforced Polytetrafluoroethylene Shaped-Charge Warhead Liner." Polymers 14, no. 10 (2022): 2068. http://dx.doi.org/10.3390/polym14102068.

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Polymer materials have important applications in the4 terminal effect and damage by shaped-charge warheads. However, the low strength of pure PTFE materials reduces the penetrability of the expansive jet from these warheads, hindering its application. This study improves the strength of pure PTFE material by adding Cu powder to the shaped-charge liner. Three types of PTFE/Cu composites with different densities are prepared. The effect of increasing the density on the performance of an expansive jet is studied by a dynamic mechanical property experiment, microscopic analysis, numerical simulation, and a penetration experiment. The results show that the toughness and impact strength of the PTFE/Cu composites improve when 18–50.5% Cu is added. The strength of the composite increases linearly with the increase in Cu content. Numerical simulations and X-ray pulse experiments reveal that the addition of Cu powder enhances the cohesiveness of the head of the expansive jet. The jet head becomes more cohesive as the Cu content is increased. However, the length and diameter of the jet become smaller. The jet can create a deeper hole in the steel target and increase damage as more Cu is added to the liner.

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33

Chunhua, Cao, Yang Di, Xie Gang, Li Rongxing, and Yu Xiaohua. "The impact properties of poly-p-phenyle nebenzobisoxazole fibers reinforced with polytetrafluoroethylene composite." Journal of Thermoplastic Composite Materials 27, no. 9 (2013): 1278–85. http://dx.doi.org/10.1177/0892705712470267.

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34

Hadad, Henrique, Bruno Chies, Laís Kawamata Jesus, et al. "Critical defect healing assessment in rat calvaria using a titanium‐reinforced polytetrafluoroethylene membrane." Clinical Oral Implants Research 31, S20 (2020): 96. http://dx.doi.org/10.1111/clr.37_13644.

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35

Feng, Yan, Tianrou Xiong, Haibo Xu, Chungen Li, and Haoqing Hou. "Polyamide-imide reinforced polytetrafluoroethylene nanofiber membranes with enhanced mechanical properties and thermal stabilities." Materials Letters 182 (November 2016): 59–62. http://dx.doi.org/10.1016/j.matlet.2016.06.074.

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36

Penggang, Ren, Liang Guozheng, and Zhang Zengping. "Study on Glass Fabric Reinforced Polytetrafluoroethylene Composites Infused with Melted Cyanate Ester Resin." Journal of Reinforced Plastics and Composites 28, no. 18 (2008): 2221–30. http://dx.doi.org/10.1177/0731684408092076.

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37

Gu, Aijuan, Guozheng Liang, and Li Yuan. "Novel preparation of glass fiber reinforced polytetrafluoroethylene composites for application as structural materials." Polymers for Advanced Technologies 20, no. 1 (2009): 39–42. http://dx.doi.org/10.1002/pat.1243.

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38

Fan, Yu, Qing-Jun Ding, and Zhi-Yuan Yao. "Properties of potassium titanate whisker reinforced polytetrafluoroethylene-based friction materials of ultrasonic motors." Journal of Applied Polymer Science 125, no. 5 (2012): 3313–17. http://dx.doi.org/10.1002/app.36528.

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39

Suh, Jiyeon, and Donghyun Bae. "Mechanical properties of polytetrafluoroethylene composites reinforced with graphene nanoplatelets by solid-state processing." Composites Part B: Engineering 95 (June 2016): 317–23. http://dx.doi.org/10.1016/j.compositesb.2016.03.082.

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40

Li, J., and Y. H. Su. "The effect of carbon fibre surface oxidation on the friction and wear properties of polytetrafluoroethylene composites under oil-lubricated conditions." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 1 (2009): 195–200. http://dx.doi.org/10.1243/09544062jmes1582.

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In this study, the effect of air oxidation and ozone surface treatment of carbon fibres (CFs) on tribological properties of CF-reinforced polytetrafluoroethylene (PTFE) composites under oil-lubricated condition was investigated. Experimental results revealed that ozone-treated CF-reinforced PTFE (CF/PTFE) composite had the lowest friction coefficient and wear compared with untreated and air-oxidated composites. An X-ray photoelectron spectroscopy study of the CF surface showed that, after ozone treatment, oxygen concentration was obviously increased, and the amount of oxygen-containing groups on CF surfaces was largely increased. The increase in the amount of oxygen-containing groups enhanced interfacial adhesion between CF and PTFE matrix. With strong interfacial adhesion of the composite, CFs were strongly bonded with PTFE matrix, and large-scale rubbing-off of PTFE was prevented; therefore, the tribological properties of the composite was improved.

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Berladir, K. V., P. V. Rudenko, К. O. Dyadyura, V. A. Sviderskiy, and О. A. Budnik. "Features of Technology for Obtaining Polymer Composite Materials Based on Polytetrafluoroethylene (Review)." Фізика і хімія твердого тіла 17, no. 4 (2016): 582–93. http://dx.doi.org/10.15330/pcss.17.4.582-593.

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The experience of many theoretical and practical works concerning the technology of PTFE-composites formation has been analyzed and systematized. The peculiarity of the work consists in the fact that PTFE-composites reinforced by carbon fibers are considered to be complex objects with properties characteristic to tribotechnical material science of composite materials. The structure complexity of such objects provides their consumer properties due to many factors, which influence the significant increase of physicomechanical characteristics. The research results defined operation regimes of process equipment: after the processing PTFE-composites have increased operation properties in comparison with basic and can be most effectively used for industrial implementation.

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Nuruzzaman, Dewan Muhammad, and Mohammad Asaduzzaman Chowdhury. "Friction Coefficient of Polymer and Composite Materials Sliding against Stainless Steel." Advanced Materials Research 576 (October 2012): 590–93. http://dx.doi.org/10.4028/www.scientific.net/amr.576.590.

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An endeavor has been made to study and compare the friction coefficient of different polymer and composite materials. Experiments were carried out when stainless steel 304 (SS 304) pin slides on different types of composite and polymer materials such as cloth reinforced ebonite (commercially known as gear fiber), glass fiber reinforced plastic (glass fiber), nylon and polytetrafluoroethylene (PTFE). Experiments were conducted at normal load 5, 7.5, 10 N, sliding velocity 0.5, 0.75, 1 m/s and relative humidity 70%. Variations of friction coefficient with the duration of rubbing at different normal loads and sliding velocities were investigated. Results show that friction coefficient varies with duration of rubbing, normal load and sliding velocity. In general, friction coefficient increases with the increase in normal load and sliding velocity for all the tested materials except nylon. At identical operating conditions, the magnitudes of friction coefficient are different for different polymer and composite materials.

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Pratama, Juniko Nur, Hyejin Lee, Dongwon Shin, and Byungchan Bae. "Reinforced Membranes with PTFE Matrix and Sulfonated Hydrocarbon Electrolyte for PEM Fuel Cells." ECS Meeting Abstracts MA2023-02, no. 39 (2023): 1883. http://dx.doi.org/10.1149/ma2023-02391883mtgabs.

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Proton exchange membrane fuel cells (PEMFCs) have emerged as a promising technology for clean energy conversion with various potential applications. Due to its cost-effectiveness, sulfonated hydrocarbon has been researched as an alternative to Nafion, a commercial proton exchange membrane. However, sulfonated hydrocarbon's mechanical and chemical stability remains a critical challenge that needs to be addressed, as the membrane must withstand harsh operating conditions, such as wet-dry mechanisms in high-temperature operations. To compete with perfluorosulfonic acid (PFSA), sulfonated hydrocarbon should be reinforced with a polytetrafluoroethylene (PTFE) substrate. However, there are significant issues with incompatibility between sulfonated hydrocarbon and PTFE substrate. To improve the impregnation, simple and reproducible chemical treatment has been developed to enhance the hydrophilicity of PTFE using a mixture of acids and oxidizing agents. Moreover, surfactant was added to increase compatibility and improve impregnation. After the reinforced membrane was fabricated, the membranes were characterized, including their water uptake and dimensional stability. The reinforced membrane also showed superior mechanical properties, including gas permeability, tensile strength, and dynamic mechanical analysis. To evaluate the degree of impregnation, the transparency of the reinforced membrane was checked for haziness and further analyzed with scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) mapping to quantify the impregnation degree. Finally, the performance and durability of the reinforced membrane were measured by single-cell and wet-dry cycling tests.

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Vasilev, A. P., T. S. Struchkova, and A. A. Okhlopkova. "Effects of Complex Fillers on the Mechanical and Tribological Properties of Polytetrafluoroethylene Composites." Materials Science Forum 992 (May 2020): 739–44. http://dx.doi.org/10.4028/www.scientific.net/msf.992.739.

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This work is devoted to studying the impact of carbon fibers with vermiculite and ultrafine polytetrafluoroethylene on the structure and properties of polytetrafluoroethylene. The mechanical and tribological characteristics of composites based on PTFE was compared depending on the content of carbon fibers. The yield strength and compressive strength improvement with increase of contents carbon fibers of the PTFE was showed. The method of X-ray analysis showed that with by introducing of complex fillers in the PTFE leads to the increasing the degree of crystallinity. PTFE-based composites reinforced complex fillers have shown a significant improvement in wear resistance compared to initial polymer. The study of the worn surface using scanning electron microscopy and IR spectroscopy to describe the tribological behavior of PTFE-based composites was carried out. Using IR spectroscopy, it was revealed that in the process of friction on the worn surface of PTFE-based composites products of tribo-oxidation are formed. It has been established that in the friction process of polymer composite materials, secondary structures are formed on the friction surface of the material, which protects the material from abrasion.

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Ji, Keju, Yanqiu Xia, Hongling Wang, and Zhendong Dai. "Foamed-metal reinforced material: tribological behaviours of foamed-copper filled with polytetrafluoroethylene and graphite." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 226, no. 2 (2011): 123–37. http://dx.doi.org/10.1177/1350650111426520.

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Pan, Bingli, Jing Zhao, Yuqing Zhang, and Yongzhen Zhang. "Wear Performance and Mechanisms of Polyphenylene Sulfide/Polytetrafluoroethylene Wax Composite Coatings Reinforced by Graphene." Journal of Macromolecular Science, Part B 51, no. 6 (2012): 1218–27. http://dx.doi.org/10.1080/00222348.2011.627821.

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Xiong, Ming, Haolin Tang, Yadong Wang, et al. "Expanded polytetrafluoroethylene reinforced polyvinylidenefluoride–hexafluoropropylene separator with high thermal stability for lithium-ion batteries." Journal of Power Sources 241 (November 2013): 203–11. http://dx.doi.org/10.1016/j.jpowsour.2013.04.064.

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Antonioli, Diego, Katia Sparnacci, Michele Laus, Luca Boarino, and Maria Cristina Righetti. "Polycarbonate-based composites reinforced by in situ polytetrafluoroethylene fibrillation: Preparation, thermal and rheological behavior." Journal of Applied Polymer Science 132, no. 32 (2015): n/a. http://dx.doi.org/10.1002/app.42401.

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Huang, An, Hrishikesh Kharbas, Thomas Ellingham, Haoyang Mi, Lih-Sheng Turng, and Xiangfang Peng. "Mechanical properties, crystallization characteristics, and foaming behavior of polytetrafluoroethylene-reinforced poly(lactic acid) composites." Polymer Engineering & Science 57, no. 5 (2016): 570–80. http://dx.doi.org/10.1002/pen.24454.

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Chao, Min, Changjuan Guo, Ailing Feng, Zhengyong Huang, Qingli Yang, and Guanglei Wu. "Improved Thermal Conductivity and Mechanical Property of PTFE Reinforced with Al2O3." Nano 14, no. 05 (2019): 1950064. http://dx.doi.org/10.1142/s1793292019500644.

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To achieve polymer-based composites for electronic packaging with high thermal conductivity, Al2O3 nanoplatelets were introduced into polytetrafluoroethylene (PTFE) matrix via a cold pressing and sintering method. The effect of mass content of the Al2O3 platelets on the morphology, mechanical properties, thermal conductivity and dielectric properties of the composites was investigated. The results revealed that the Al2O3/PTFE nanocomposites exhibited higher thermal conductivities, better thermal stabilities, enhanced mechanical properties with considerable dielectric properties. The largest thermal conductivity of the Al2O3/PTFE nanocomposites filled with 25[Formula: see text]wt.% Al2O3 platelets was 0.461[Formula: see text]W[Formula: see text]m[Formula: see text][Formula: see text]K[Formula: see text], increased by 85% compared with that of pure PTFE. The improved thermal conductivity of Al2O3/PTFE can be attributed to the formation of effective thermal conductance network within the PTFE matrix due to the interconnectivity of Al2O3 platelets.

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