Evaluation of Mechanical, Friction, and Wear Characteristics of Nano‐SiC Filled Ortho Cresol Novalac Epoxy Composites under Dry Sliding Condition

Dass, Kali; Chauhan, S.R.; Gaur, Bharti

doi:10.1002/adv.21491

Cited by 8 publications

(6 citation statements)

References 43 publications

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“…The possible reason may be due to the toughening effect of EPU, which is consistent with the theory reported in the literature. But for the friction coefficient, due to modulus decrease the deformation of surface under same rubbing process increased, so the real area of the contact increased, resulting in the increase in the coefficient of friction [35].…”

Section: Resultsmentioning

confidence: 99%

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

Zhang

Yao

et al. 2020

Polymer Engineering & Sci

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Epoxy matrix nanocomposites were prepared by diglycidyl ether of bisphenol A (DGEBA) modified with epoxide polyurethane (EPU) containing oxazone‐group and reinforced by low concentrations of octaaminophenyl polyhedral oligomeric silsesquioxane (OAPOSS). The thermal, mechanical, and thermomechanical properties of as‐prepared hybrid nanocomposites were studied. The results demonstrate that the thermal stability, tensile strength, glass transition temperature, and storage modulus of epoxy polymer/EPU blends are all significantly improved with OAPOSS as an reinforcement. The inclusion of EPU in the epoxy polymer helps improve the toughness of the matrix, providing higher impact strength, and higher elongation at break. Tribological testing shows that the wear rate of the hybrid nanocomposite is reduced by more than 80% at 0.1 wt% OAPOSS compared with pure epoxy‐EPU, while the friction coefficient is nearly unchanged. SEM‐EDS analysis of worn scar indicates that the wear mechanism of OAPOSS incorporated hybrid composites is the coexistence of abrasive wear and adhesive wear. The improved properties are due to the uniform dispersion of OAPOSS in the epoxy‐EPU matrix and network formation by cross‐linking and chemical bonds from OAPOSS reacted with epoxy‐EPU matrix.

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Section: Resultsmentioning

confidence: 99%

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

Zhang

Yao

et al. 2020

Polymer Engineering & Sci

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“…Adhesive abrasion is the main tribological mechanism of pristine and low‐dose‐irradiated UHMWPE . In this case, a thin film is transferred to the friction component after a brief application of friction, decreasing the wear . However, the high‐dose‐irradiated X‐UHMWPE existed as particles in the composites exposed after a brief application of friction, which increased the roughness of the contact surface and damaged the transferred film existed on surface of friction component .…”

Section: Resultsmentioning

confidence: 99%

“…Serious aggregation will decrease the interface bonding between matrix and filler . Consequently, the particles could be easily separated from the matrix, deteriorating the wear resistance performance . Therefore, low filler content was applied in this work.…”

Section: Resultsmentioning

confidence: 99%

More wear‐resistant and ductile UHMWPE composite prepared by the addition of radiation crosslinked UHMWPE powder

Wang

Zhang

et al. 2016

J of Applied Polymer Sci

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Radiation crosslinked ultrahigh molecular weight polyethylene (X-UHMWPE) powder was prepared by g-ray irradiation under nitrogen atmosphere with a dose of 50-200 kGy at a dose rate of 7 kGy/h and further annealing in vacuum at 120 8C for 4 h. The crosslinked powder was characterized by FT-IR spectroscopy, gel content, and hot-press molding. Then, X-UHMWPE was added to pristine UHMWPE to prepare a composite with 0-25 wt % filler. The morphology, wear resistance, and tensile property of the composite were investigated. Using X-UHMWPE as a filler could sufficiently improve the wear resistance of the composite. Adding 25 wt % X-UHMWPE (dose: 150 kGy) improved wear resistance by 130% and retained approximately 90% tensile strength and 70% ductility. Wear-resistant and ductile UHMWPE composite may be potentially used for artificial joint replacement and engineering devices. The proposed route is useful in fabricating UHMWPE material with excellent comprehensive performance or functional polymer composite. INTRODUTIONUHMWPE is a polymer with numerous outstanding properties such as chemical inertness, excellent biocompatibility, good mechanical properties, and widely used in medical and engineering applications. Several unsatisfactory mechanical properties of this polymer are its poor creep-resistance and yield strength. Although UHMWPE exhibits better wear resistance than many other polymers, prolonged use of medical devices made from this polymer used as artificial joint produced debris in the human body. 1 This phenomenon shortens the lifetime of the device and induces pain to the patient. 2,3 Therefore, improving the wear resistance of UHMWPE is still urgent for its application as artificial organ and in engineering devices. Physical blending 4 and radiation crosslinking 5 are two useful methods for improving the wear resistance of UHMWPE. 6,7 Many fillers, such as carbon black, carbon fibers, 8,9 carbon nanotubes (CNTs), 7,10 and Al 2 O 3 , have been added to UHMWPE for physical blending to improve the wear resistance of this polymer. 11 However, dispersion compatibility remains a problem in most cases primarily because of the remarkable difference in chemical structure and surface energy. In addition, the chemical and physiological toxicity of the added material are important in vivo. For instance, 0.1 wt % CNTs in polyethylene can reduce the 80% wear of polyethylene, 12 but this supplementation can even induce cancer in vivo. 13 Therefore, these composites have not been used clinically. Polyethylene blends with other types of polyethylene exhibit better compatibility and lower physiological toxicity than blends with other materials. [14][15][16] This blending method can be used to improve the mechanical properties of UHMWPE. 15,17 Radiation crosslinking can obviously alter the chemical and crystal structures of UHMWPE. This process increases the molecular weight and induces the formation of crosslinking networks. These characteristics sufficiently improve the mechanical properties of UHMWPE such as creep resistanc...

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“…This can be attributed to the MG can improve the hardness and resistance of decomposition of composite, compared with neat EP [23]. Contact temperature is another significant factor that impacts the coefficient of friction [41]. Incorporating MG reduces the contact temperature.…”

Section: Effects Of Content and Particle Size Of Mg On Coefficient Ofmentioning

confidence: 99%

Surface-Modified Garnet Particles for Reinforcing Epoxy Composites

Jiang

Liu

et al. 2018

Minerals

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The present study investigated the tribological performance of epoxy (EP) matrix composites enhanced with natural garnet. The garnet was surface-modified with sodium stearate for optimal performance. Composites comprising different contents and particle sizes of modified garnet (MG) were prepared with a mixture of EP and MG. The sodium stearate-bonded garnet and EP formed a stable structure. Tribological performance was measured by a ball-on-plate apparatus under permanent dry sliding conditions and a wear track was obtained by an optical profilometer. The wear mechanism was explored by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) images. Wear test results showed that the coefficient of friction for all EP/MG composites decreased compared with that for neat epoxy. The results also indicated that the addition of MG can evidently improve the tribological properties of EP matrix composites.

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Evaluation of Mechanical, Friction, and Wear Characteristics of Nano‐SiC Filled Ortho Cresol Novalac Epoxy Composites under Dry Sliding Condition

Cited by 8 publications

References 43 publications

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

Thermal, mechanical, and tribological properties of epoxy polymer/EPU blends reinforced by low concentration of octaaminophenyl POSS

More wear‐resistant and ductile UHMWPE composite prepared by the addition of radiation crosslinked UHMWPE powder

Surface-Modified Garnet Particles for Reinforcing Epoxy Composites

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