Influence of nanoclays on mechanical and barrier properties of hydrogenated acrylonitrile butadiene rubber nanocomposites

Cadambi, Rahul M.; Ghassemieh, Elaheh

doi:10.1179/1743289810y.0000000025

Cited by 14 publications

(17 citation statements)

References 25 publications

(36 reference statements)

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“…Various types of 2D particles have been incorporated into diverse elastomeric matrices to improve their barrier properties against gases and solvents. Natural or synthetic layered silicates, such as montmorillonite (MMT), rectorite clay (REC), cloisite and vermiculite clay, have also been extensively studied as nanofillers for elastomers to lower their permeabilities[279][280][281][282][283][284]. For example, the incorporation of 20-30…”

mentioning

confidence: 99%

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Guo

Tang

Zhang

2016

Progress in Polymer Science

134

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mentioning

confidence: 99%

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Guo

Tang

Zhang

2016

Progress in Polymer Science

134

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“…and . This variation is primarily due to the change in segmental mobility of the chains . However, compared to other elastomers, HNBR can still provide a fairly strong reinforcement at 150°C.…”

Section: Resultsmentioning

confidence: 99%

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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“…More details on the preparation methods can be found in our earlier publications. 15,16 To investigate the effects of silanes with nanoclays on the HNBR matrix, two different commercially available silanes, amino silane (AS) and sulfido silane (SS), were used. The masterbatch preparation followed has been the same as mentioned above.…”

Section: Preparation Of Hnbr/c15a Nanocompositesmentioning

confidence: 99%

“…Our focus of research work here is to develop a new novel O‐ring material for sealing applications that can withstand high temperature and pressure at different harsh conditions. In recent times, our research team has reported improvement in the properties after reinforcing various other elastomers with nanoclays, such as ethylene propylene diene monomer,14 NBR,14 and HNBR 15–19. Other than developing a novel rubber seal material, the main purpose of our past research was to develop a novel way of dispersing nanoclays into the rubber matrix that is more suitable for industrial production line and formulation.…”

Section: Introductionmentioning

confidence: 99%

“…Other than developing a novel rubber seal material, the main purpose of our past research was to develop a novel way of dispersing nanoclays into the rubber matrix that is more suitable for industrial production line and formulation. Our previous investigations involving detailed and elaborate study of the optimization and preparation,15, 16 morphological and viscoelastic properties,17, 18 mechanical behavior at room temperature and elevated temperature,18 and the ageing and swelling behavior19 of HNBR/clay nanocomposites have been reported elsewhere.…”

Section: Introductionmentioning

confidence: 99%

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Mechanism of Gas Permeation in Processed HNBR/Nanoclay Composites

Cadambi¹,

Ghassemieh²

2012

Adv Polym Technol

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The influence of the layered silicate clay platelets on the nitrogen permeation properties of hydrogenated nitrile butadiene rubber (HNBR)/nanoclay nanocomposites has been investigated. Nanocomposites of HNBR modified with different percentages of the organoclay are processed through various routes. Commercially available organoclay (CLOISITE 15A) and various silane-coupling agents are used to improve the dispersion of the nanoclay in HNBR. A total of 10 different formulations of nanocomposites are manufactured. The addition of the organoclay has resulted in a significant enhancement of the nitrogen barrier properties of the manufactured nanocomposite. The mechanism of the reduction in the permeability is explained through the changes in the morphology and its bond to the filler. These changes are confirmed through examination of the morphology using x-ray diffraction, transmission electron microscope, and dynamic mechanical thermal analysis. There has been a drastic reduction up to 55.7% in nitrogen permeability. The reduction in gas permeation in HNBR is attributed to uniformly exfoliated clay platelets. Finally, three different permeability models, namely, the Nielsen model, modified Nielsen model, and Cussler model, have also been considered to predict the permeability behavior of nanocomposites with different volume filler fractions. The experimental values of gas permeability have been compared with theoretical models. It is observed that the modified Nielsen model closely matches with the measured permeation behavior. C 2011 Wiley Periodicals, Inc.

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Influence of nanoclays on mechanical and barrier properties of hydrogenated acrylonitrile butadiene rubber nanocomposites

Cited by 14 publications

References 25 publications

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

Transport performance in novel elastomer nanocomposites: Mechanism, design and control

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

Mechanism of Gas Permeation in Processed HNBR/Nanoclay Composites

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