Study on mechanical and tribological properties of cerium oxide/fluorine rubber composites

Kang, Qianrui; Li, Anling; Zhang, Xiaoxiao; Xu, Zehua; Wang, Jiwen; He, Qiang

doi:10.1016/j.mtcomm.2021.102596

Cited by 11 publications

(7 citation statements)

References 20 publications

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“…According to Table 4, the higher amount of filler resulted in increased hardness in all compounds equivalently. As observed in recent investigations, 7,8 a reduction in the plastic deformation of the surface results in higher surface and subsurface resistance to penetration and hence a smaller indentation depth during the indentation test, which results in improved hardness. Increasing hardness makes the elastomer more rigid, directly interfering with properties such as tension and elongation.…”

Section: Physicochemical Propertiesmentioning

confidence: 54%

“…Improvements in the mechanical and tribological properties of FKMs have been observed. 7 Despite the high resistance of FKM to chemical media and its long-term resistance at a high temperature of 250 C, this material still suffers from poor mechanical and electrical properties and inadequate wear resistance. To overcome these problems, researchers have proposed enhancing the performance of FKM by the filler modification method.…”

Section: Introductionmentioning

confidence: 99%

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Solvent‐free synthesized zeolites as compatibility agents in FKM rubber

Petkowicz

Silva

Mignoni

et al. 2023

J of Applied Polymer Sci

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Dry hybrid synthesized zeolite was added to a fluoroelastomer (FKM). Carbon black filler was also evaluated. The resulting systems were evaluated in terms of rheological, physicochemical and morphological characteristics. Replacing carbon black with zeolites decreased the torque maximum (125–144 nM) for all samples. The type of filler has a significant influence on the thermal stability of FKM compounds. The use of x‐ray microtomography (IMX for) on the investigated samples (fluorinated polymers) was shown to be a potential and powerful tool for fractioning the components of the resulting composite material. According to microtomography images, increasing the filler content increases the number of pores, probably due to the greater difficulty in dispersing larger volumes of fillers, which are shown as interconnected conglomerates. The SodC8.5 filler showed a considerable increase in stress at rupture (11 MPa) with only 1 phr, maintaining stability up to 10 phr, while elongation at break increased. The use of Sod and SodC8.5 loads showed an improvement of 15% and 30% in relation to the base compound. Finally, in a thermal stability test at the temperature of liquid N2, the SodC8.5 sample showed the best dimensional stability (approx. 7%), verifying the good compatibility between the filler and the fluorinated polymeric matrix.

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Section: Physicochemical Propertiesmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Solvent‐free synthesized zeolites as compatibility agents in FKM rubber

Petkowicz

Silva

Mignoni

et al. 2023

J of Applied Polymer Sci

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“…This indicates that the t-CTLF had been successfully reduced to t-HTLF, which is consistent with the 1 H-NMR results. The fluorine contents in the raw material and product molecular chains were further calculated [52], and the specific characteristic peaks are shown in Table 1 The monomer contents (X) of t-CTLF before and after the reduction reaction were calculated using the following Equations ( 5), ( 6) and (7). The fluorine contents in the raw material and product molecular chains were further calculated [52], and the specific characteristic peaks are shown in Table 1 18 .…”

Section: F-nmr Spectra Of the Liquid Fluoroelastomersmentioning

confidence: 99%

“…Therefore, the focus of this paper is fluoroelastomers, especially terpolymers. The thermal stabilities and mechanical properties of terpolymers are better than those of copolymers [6,7]. The poly(VDF-ter-TFE-ter-HFP) terpolymer, a terpolymer of VDF, TFE, and HFP, is a high-quality material used in aviation, aerospace, automotive, and other industries [8].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of the Novel High-Performance Hydroxyl-Terminated Liquid Fluoroelastomer

Chen

et al. 2023

Polymers

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Functional liquid fluoroelastomers are in high demand in new energy fields. And these materials have potential applications in high-performance sealing materials and as electrode materials. In this study, a novel high-performance hydroxyl-terminated liquid fluoroelastomer (t-HTLF) with a high fluorine content, temperature resistance, and curing efficiency was synthesised from a terpolymer of vinylidene fluoride (VDF), tetrafluoroethylene (TFE), and hexafluoropylene (HFP). A carboxyl-terminated liquid fluoroelastomer (t-CTLF) with controllable molar mass and end-group content was first prepared from a poly(VDF-ter-TFE-ter-HFP) terpolymer using a unique oxidative degradation method. Subsequently, an efficient “one-step” reduction of the carboxyl groups (COOH) in t-CTLF into hydroxyl groups (OH) was achieved via the functional-group conversion method using lithium aluminium hydride (LiAlH4) as the reductant. Thus, t-HTLF with a controllable molar mass and end-group content and highly active end groups was synthesised. Owing to the efficient curing reaction between OH and isocyanate groups (NCO), the cured t-HTLF exhibits good surface properties, thermal properties, and chemical stability. The thermal decomposition temperature (Td) of the cured t-HTLF reaches 334 °C, and it exhibits hydrophobicity. The oxidative degradation, reduction, and curing reaction mechanisms were also determined. The effects of solvent dosage, reaction temperature, reaction time, and ratio of the reductant to the COOH content on the carboxyl conversion were also systematically investigated. An efficient reduction system comprising LiAlH4 can not only achieve an efficient conversion of the COOH groups in t-CTLF to OH groups but also the in situ hydrogenation and addition reactions of residual double bonds (C=C) groups in the chain, such that the thermal stability and terminal activity of the product are improved while maintaining a high fluorine content.

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“…Although studies on the thermal degradation of carbon composites, the ageing effect of solid propellant rocket motors, and the lifespan of plasma pulse thrusters have been frequently conducted, comparably few studies have been conducted on fluoro rubber (FKM) composites [11][12][13][14][15]. He et al studied the hydrophobicity and self-cleaning properties of FKM manufactured in a template method at high temperature for the practical application of FKM bearing seals.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the physical properties of a fluoro rubber complex

Park

Lee²,

Kim

2022

Materials Science and Technology

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This study presents an accelerated life prediction of the special fluoro rubber under various ageing temperatures. It was predicted by evaluating the changes in physical properties under accelerated ageing time at 150°C, 175°C, and 200°C and the corresponding change in physical properties at 80°C. The present study shows the activation energy of 29,730 kcal mol−1 and the reaction constant of 23.673 from tensile strength and 12,227 kcal mol−1 and 6.044 from elongation. Comparing the predicted weight and volume change rate from tensile strength and those from elongation, respectively at 80°C, the predicted ones of tensile strength tended to be more alike the actual results.

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Study on mechanical and tribological properties of cerium oxide/fluorine rubber composites

Cited by 11 publications

References 20 publications

Solvent‐free synthesized zeolites as compatibility agents in FKM rubber

Solvent‐free synthesized zeolites as compatibility agents in FKM rubber

Synthesis and Properties of the Novel High-Performance Hydroxyl-Terminated Liquid Fluoroelastomer

A comparative study on the physical properties of a fluoro rubber complex

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