Properties Investigation of novel nitrile rubber composites with rockwool fibers

Rocha, Elisson Brum Dutra da; Sousa, Atos Alves de; Furtado, Cristina R. G.

doi:10.1016/j.polymertesting.2019.106291

Cited by 20 publications

(9 citation statements)

References 43 publications

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“…Montmorillonite (MMT) is a kind of layered silicate clay for rubber fillers because of its high specific surface area, high cation exchange capacity, and good mechanical stability 8,9 . The remarkable enhancement of the mechanical properties and thermal stability of composites is attributed to the dispersion of MMT in the rubber matrix 10–12 . However, the presence of active hydroxyl and alkoxy functional groups on the nanofiller makes it inherently acidic and hydrophilic, resulting in poor polymer‐filler interaction between the rubber hydrocarbon and the nanofiller 13 .…”

Section: Introductionmentioning

confidence: 99%

Flame‐retardant behavior and mechanism of theSBR/MMTcomposites modified by melamine matrix modifier

Cheng

Xuan

Tang

et al. 2021

J of Applied Polymer Sci

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Melamine quaternary ammonium salt (MQAS), a novel flame‐retardant intercalation modifier, was used to prepare the flame‐retardant organic montmorillonite (FOSM), and which was added to SBR by a two‐roll mixing and molding process to prepared the SBR/FOSM composites. The synergistic flame‐retardant effects of sodium‐based montmorillonite (MMT) and MQAS were investigated by the various methods. The LOI value of SBR was only 19.1%, and FOSM‐4 increased the LOI value of SBR to 24.3%. The cone calorimetry test showed that compared with SBR, the total heat release and the peak heat release rate of SBR/FOSM were reduced by 81.39% and 86.08%, respectively. The analysis of MMT after modification showed that the grafting rate of MQAS was about 10% and the interlayer spacing of MMT was enlarged by about 20%. The synergy of MQAS and MMT not only effectively solves the violent droplet of pure SBR combustion, but also avoids the curling problem of only adding MMT. The char morphology and TG‐FTIR showed that FOSM had dual flame‐retardancy in the condensed phase and the gas phase. The synergistic flame‐retardant effect of phosphorus‐free flame‐retardant modifier and MMT will open up new possibilities for flame‐retardant elastomer composites.

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Section: Introductionmentioning

confidence: 99%

Flame‐retardant behavior and mechanism of theSBR/MMTcomposites modified by melamine matrix modifier

Cheng

Xuan

Tang

et al. 2021

J of Applied Polymer Sci

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“…Our previous study also reported that RW had no effect on the t 90 of NBR composites containing only RW. 31 Despite the fact that CB is known to accelerate sulfurvulcanization due to surface chemistry, 6,37-39 Hosseini and Razzaghi-Kashani 39 stated that depending on the CB type, the vulcanization kinetics decreases as the amount of CB increases. Below a critical CB loading, according to the authors, the kinetics are accelerated due to the CB catalytic effect on the formation of polysulfide molecules.…”

Section: Rheometric Properties and Cldmentioning

confidence: 99%

“…These findings regarding the contribution of RW on the increase in thermal stability of rubber composites are in accordance with our previous study, in which NBR filled with 40 phr of RW exhibited a greater T 5%wt (369 C) than unfilled NBR (350 C), although no statistically significant difference was observed between the two samples in relation to T max values (459 C for unfilled NBR and 457 C for NBR/40 phr of RW). 31 Kuranska et al 56 reported an increase in thermal behavior for polyurethane composites reinforced with basalt powder. Regarding CB, Amin et al 38 reported an increase in temperatures related to 10% of weight loss (T 10%wt ) at 5 C for the NBR composites with 50 phr of CB.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Advantages of using a dual‐filler system with carbon black and rockwool fiber on Nitrile Rubber composites from a technical standpoint

da Rocha,

de Sousa,

Furtado

2024

Polymer Composites

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This study produced and characterized composites based on nitrile rubber reinforced with rockwool fiber (RW) and carbon black (CB). Ten formulations with dual‐filler loading amounts ranging from 0 to 40 phr of CB and RW were designed using a simplex‐centroid mixture. The composites were assessed regarding their rheometric, rheological, mechanical, and thermal properties. The use of the RW in the dual‐filler system contributed to overall improvements in Shore A hardness, tear strength, modulus at 50%, and resilience, as well as reducing the Payne effect. Instead of using 40 phr of CB alone, a dual‐filler system comprising 20 phr of CB and 20 phr of RW lowers the Payne effect by around 60%, improves resilience by 35%, modulus at 50% strain by 8%, and the residual stress at equilibrium (σ∞/σ0) by 7%. On the other hand, the tensile strength is reduced by 23%. The optimum cure time, crosslink density, and maximum decomposition rate temperature were not affected by the rockwool's presence in the dual‐filler system. In general, the use of RW in combination with CB is advantageous mainly because it reduces compressive stress relaxation, which is an important property for sealing applications.Highlights Dual‐filler systems based on carbon black (CB) and rockwool fiber (RW) offer advantages. RW‐rich dual‐filler systems reduce stress relaxation. RW‐rich dual‐filler systems reduce the Payne effect. CB‐rich dual‐filler systems increase tensile strength.

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“…Factors affecting the lubrication film include operation speed, working pressure and temperature, so should be based on different application environments and material properties, choose the appropriate sealing material. Table 1 shows the properties and service temperatures of several commonly used rubber sealing materials [133], incluing natural rubber(NR) [125], silicone rubber (MVQ) [126], nitrile rubber(NBR) [127], chloroprene rubber(CR) [128], fluororubber(FKM) [129], polyurethane rubber(PUR) [130], ethylene propylene diene monomer rubber(EPDM) [131] and acrylate rubber(ACM) [132]. It is very important to consider the compatibility of oil and sealing material to prevent liquid leakage and maintain constant pressure and energy transfer.…”

Section: Failure Analysis Of Rubber Sealmentioning

confidence: 99%

Research status and prospect of wear and aging on hydraulic rubber sealing materials

Zhang

Yang

Wang

et al. 2023

Plastics, Rubber and Composites

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The aging and wear of rubber seals cause frequent maintenance of the hydraulic system. Based on the literature, the failure mechanism of aging and wear of rubber materials in hydraulic system was studied in this paper. Fretting wear, abrasive wear, fatigue wear and adhesive wear were the main wear mechanisms. The swelling aging of rubber accelerates the wear. At the same time, the factors affecting the wear resistance of rubber such as temperature, displacement amplitude, liquid medium and surface roughness were discussed. The research status of improving the wear resistance of rubber in recent years was introduced from three aspects: reinforcing filler, surface treatment, heat generation and heat conductivity of rubber, and the development trend of hydraulic sealing technology in the future was prospected.

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Properties Investigation of novel nitrile rubber composites with rockwool fibers

Cited by 20 publications

References 43 publications

Flame‐retardant behavior and mechanism of theSBR/MMTcomposites modified by melamine matrix modifier

Flame‐retardant behavior and mechanism of theSBR/MMTcomposites modified by melamine matrix modifier

Advantages of using a dual‐filler system with carbon black and rockwool fiber on Nitrile Rubber composites from a technical standpoint

Research status and prospect of wear and aging on hydraulic rubber sealing materials

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