Mechanical properties of carbon black filled hydrogenated acrylonitrile butadiene rubber for packer compounds

He, Xiaozhen; Shi, Xinyan; Hoch, Martin; Gögelein, Christoph

doi:10.1016/j.polymertesting.2016.06.009

Cited by 45 publications

(19 citation statements)

References 16 publications

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“…It is also relevant to point out that with 5 phr of AP, treated or untreated with IL, the moduli at 100% strain were considerably higher than those of HNBR and HNBR/CB40 (Table ). Previously reported HNBR materials prepared with 50 and 65 phr CB and 6 phr peroxide showed lower moduli at 100% strain than the HNBR with 5 phr of IL‐treated AP of the current study, and this achieved without any CB, and with less peroxide (3 phr) . As such, AP‐IL is a promising substitute for CB, providing materials with superior mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

“…For instance, short synthetic fiber‐reinforced rubbers are being applied in sealing products, such as gaskets and packers . Packers are widely employed in very harsh environments, at high pressures and high temperatures, for oil and gas exploration . In most applications, rubbers such as hydrogenated nitrile butadiene rubber (HNBR) are typically reinforced with high loadings of carbon black (CB) particles to obtain the desirable levels of stiffness and mechanical strength .…”

Section: Introductionmentioning

confidence: 99%

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Aramid pulp reinforced hydrogenated nitrile butadiene rubber composites with ionic liquid compatibilizers

Silva

Barros

Conceição

et al. 2019

J of Applied Polymer Sci

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Although carbon black is an effective reinforcement for most rubbers, its replacement by other fillers would be beneficial. Aramid fibers are used in a range of applications in the rubber industry, providing dimensional stability prior to vulcanization and improving the mechanical properties of the elastomeric product. Nevertheless, their relatively inert surface is an obstacle in the exploitation of their full potential. In this work, two ionic liquids were investigated as compatibilizers in the preparation of hydrogenated nitrile butadiene rubber composites with aramid pulp and carbon black fillers. The materials were characterized using swelling, hardness and tensile tests, differential scanning calorimetry, thermal gravimetric analysis, and infrared spectroscopy. The carbon black‐free composite prepared from aramid pulp treated with 1.0 wt% of 1‐carboxymethyl‐3‐methylimidazolium chloride outperformed all other studied materials, presenting a higher modulus at 100% strain (7.31 MPa), while maintaining high strain at break. Thus, ionic liquids were found to potentialize the aramid reinforcement effect in these rubber composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48702.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aramid pulp reinforced hydrogenated nitrile butadiene rubber composites with ionic liquid compatibilizers

Silva

Barros

Conceição

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Therefore, Δ G ′ was used to represent the difference between the value of G ′ of the available filler in the rubber at low strain amplitude ( G ′ max ) and that at high strain ( G ′ min ) (Δ G ′ = G ′ max − G ′ min ). The higher the value of Δ G ′, the greater the filler–filler interaction and the lower the filler–rubber interaction . As can be seen in Figure a, as the content of modified starch increases the value of Δ G ′ increases, reaching a maximum of 4.41 for the modified starch loading of 20 phr.…”

Section: Resultsmentioning

confidence: 88%

Preparation and Physical Properties of Porous Starch/Natural Rubber Composites

Jie

Pan

et al. 2018

Starch Stärke

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Porous starch is modified by the addition of dodecenyl succinate anhydride (DDSA), to decrease the self-aggregation, and then blended with natural rubber (NR) latex to obtain the modified starch/NR composites. The composites are found to have improved properties compared with the corresponding pure NR. Results of a thermal analysis show that the thermal degradation reaction of modified starch/NR composites is a two-step reaction, with the initial (T 0 ) and the final (T f ) temperatures of main reaction being increased, and glass transition temperature (T g ) slightly reduced compared with the corresponding pure NR. The curves of elastic modulus (G 0 ) and loss factor (tanδ) versus the strain of unvulcanized rubber compounds are obtained using a rubber process analyzer. Dynamic mechanical thermal analysis shows that the rolling resistance of the composites is improved by the addition of modified starch.

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“…Therefore, we chose CB N220 for good processing properties and strong reinforcement. However, our previous work has shown that CB‐filled HNBR compounds cannot fully meet the requirements of packer elements . We found that the filler‐filler interactions are more temperature dependent than the filler‐polymer interactions.…”

Section: Introductionmentioning

confidence: 68%

Mechanical properties of aramid fiber and carbon black filled hydrogenated nitrile rubber for packer compounds

Shi

Hoch³

et al. 2017

Polymer Composites

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For the use in packer elements for oil exploration, rubber materials are required that can withstand high mechanical loads, high temperatures, and aggressive chemical media. To fulfill these demands, we designed composites of hydrogenated acrylonitrile butadiene rubber filled with both carbon black and short cut aramid fibers. Scanning electron micrographs indicate a strong connection between the resorcinol formaldehyde latex fiber coating and the peroxide-cured rubber matrix. During the preparation of the test specimens, especially care was taken to obtain samples with very well-defined fiber orientations. We studied the effect of fiber anisotropy on the hardness and on the mechanical properties under uniaxial elongation and cyclic compression at room temperature and 1508C. The strongest reinforcing effect is observed when the fibers are oriented along the main direction of deformation. For tensile test, this is the case, as expected, for fibers oriented parallel to elongation. For compression tests on cylindrical specimens, we find that the fiber orientation perpendicular to compression direction is most effective. At 20-40% strain, tensile tests exhibit a pronounced yield stress which is likely the result of the loss of adhesion between the rubber matrix and the fibers. Repeated loading and unloading compression tests reveal a considerable stress softening effect between the first and second cycle for fiber-filled composites. At 1508C, the rubber composites soften considerably, but small amounts of fiber still induce a significant reinforcement. POLYM. COMPOS., 00:000-000, FIG. 9. SEM-Micrographs of a RFL-coated aramid fiber (a), a fiber located at the fracture surface of a tensile test specimen with fibers oriented in L-direction (b), and fracture surfaces of composites with 80 phr CB, 6 phr peroxide, and 6 phr AF with fibers oriented in L-and T-orientation, (c) and (d), respectively.

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Mechanical properties of carbon black filled hydrogenated acrylonitrile butadiene rubber for packer compounds

Cited by 45 publications

References 16 publications

Aramid pulp reinforced hydrogenated nitrile butadiene rubber composites with ionic liquid compatibilizers

Aramid pulp reinforced hydrogenated nitrile butadiene rubber composites with ionic liquid compatibilizers

Preparation and Physical Properties of Porous Starch/Natural Rubber Composites

Mechanical properties of aramid fiber and carbon black filled hydrogenated nitrile rubber for packer compounds

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