Effect of Alumina Modified by Silane on the Mechanical, Swelling and Dielectric Properties of Al2O3/EPDM/SBR Blend Composites

Abdelsalam, Amir A.; Ward, Azza A.; Abdel-Naeem, Gamal; Mohamed, Wael S.; El‐Sabbagh, Salwa H.

doi:10.1007/s12633-023-02290-0

Cited by 9 publications

(6 citation statements)

References 38 publications

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“…It is obvious from the data that the equilibrium swelling percentage ( Q ) begins high at the blank NBR composite (131%), and then it decreases by addition of 1 phr of TMQ (117%), 1 phr of RC (116%), and 2 phr of RC (105%) antioxidants. This decrease may be attributed to the strong crosslinks formed during curing preventing the solvent from passing through the inner structure of rubber compounds leading to low swelling 30 . The molecular weight (Mc) between crosslinks is given in Data S1.…”

Section: Resultsmentioning

confidence: 99%

“…This decrease may be attributed to the strong crosslinks formed during curing preventing the solvent from passing through the inner structure of rubber compounds leading to low swelling. 30 The molecular weight (Mc) between crosslinks is given in Data S1. NBR containing 2 phr of RC shows the lowest Mc (881.45 g/mole).…”

Section: Swelling Properties and Crosslink Density Of The Prepared Nb...mentioning

confidence: 99%

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Rhodanine‐chitosan hydrogel as a novel antioxidant for acrylonitrile‐butadiene rubber composites

Zidan

2023

Vinyl Additive Technology

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Rhodanine‐chitosan (RC) hydrogel is examined as a novel antioxidant for acrylonitrile‐butadiene rubber (NBR) composites. RC is added to NBR with different proportions (1, 2 phr) and compared to the commercial 2,2,4‐trimethyl‐1,2‐dihydroquinoline polymer (TMQ) antioxidant. Physico‐mechanical properties including tensile strength, elongation, and modulus are also studied. It is found that NBR composite containing 2 phr of RC has the most favorable mechanical properties. The formed composites were subjected to thermo‐oxidative aging at 90°C for 1, 3, and 5 days. It is noticed that NBR composite containing 2 phr of RC is the most resistant to aging. Swelling properties and crosslink density are also determined. Composite containing 2 phr of RC has also higher crosslink density than the other prepared composites. The formed NBR composites containing both TMQ and RC are characterized by Fourier transforms infrared (FTIR), thermogravimetric analysis (TGA), and field emission scanning electron microscope (FESEM). The effect of aging on chemical structure of the composite and on surface morphology are also studied. It is found that the chemical structure of the composites containing 2 phr of RC is not affected by aging.Highlights Rhodanine‐chitosan (RC) is assessed as a new antioxidant for acrylonitrile‐butadiene rubber (NBR). RC is incorporated into NBR at two different concentrations: 1 and 2 phr. Mechanical, thermo‐oxidative aging, and swelling properties are evaluated. Thermal stability, Fourier transforms infrared and field emission scanning electron microscope are studied. Vulcanizates with 2 phr of RC show the most superior properties.

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Section: Resultsmentioning

confidence: 99%

Section: Swelling Properties and Crosslink Density Of The Prepared Nb...mentioning

confidence: 99%

Rhodanine‐chitosan hydrogel as a novel antioxidant for acrylonitrile‐butadiene rubber composites

Zidan

2023

Vinyl Additive Technology

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“…Blank rubber composite is the most swelled while rubber composite (3c) is the least swelled in toluene as represented in Figure 10. Due to further crosslinks formed during curing by the presence of polyanilines in rubber composites, it becomes difficult for toluene to penetrate through the gaps present between rubber chains resulting in low swelling percent 28 . Crosslink density is the opposite of equilibrium swelling; hence, rubber composite (3c) is the most crosslinked, while blank is the least crosslinked one as illustrated in Figure 11.…”

Section: Resultsmentioning

confidence: 99%

Investigation of novel polyanilines as new antioxidants for ethylene propylene diene monomer rubber composites

Zidan,

Kandil

2023

J of Applied Polymer Sci

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Oxidative aging is a significant deterioration process that affects the performance and durability of rubber materials in various applications. Therefore, this study focuses on the development of new antioxidants‐based on polyaniline for ethylene propylene diene monomer (EPDM) rubber to enhance its resistance to oxidative aging. The novel polyanilines were prepared using in situ polymerization method and characterized using Fourier transforms infrared (FTIR) and thermogravimetric analysis (TGA). FTIR illustrates the success synthesis of polyanilines as it shows their characteristic functional groups. The thermal stability of the formed polyanilines is discussed through TGA and derivative of thermogravimetry (DTG) curves. The curves prove the good thermal stability of the synthesized polymers. The prepared polyaniline compounds were mixed to carbon black filled‐EPDM rubber composites using a roll mill and then vulcanized using sulfur curing process. Accelerated aging tests for the prepared EPDM rubber composites were conducted to evaluate the effectiveness of the antioxidants. Moreover, their impact on rheometer, mechanical, and swelling properties was studied. The results showed that the EPDM samples with the prepared polyaniline compounds exhibited improved oxidative properties compared to the EPDM sample with commercial antioxidant 2,2,4‐trimethyl‐1,2‐dihydroquinoline. These findings suggest that the novel antioxidants have the potential to enhance the durability and performance of EPDM rubber in various applications.

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“…Figures 14(b) and (c) at room temperature also depict the effects of molar mass/molecular weight on aliphatic and chlorinated penetrants on the MPU by silicone rubber/mHNTs nanotubes. Prior studies [82] have shown that solvent absorption decreases with increasing molar mass/molecular weight of both aliphatic and aromatic penetrants. Dichloromethane in particular demonstrates lower equilibrium absorption than n-pentane in aliphatic solvents and lower equilibrium intake than chloroform in chlorinated solvents.…”

Section: Figure 10 Abrasion Loss Of Silicone Rubber Nanocompositesmentioning

confidence: 92%

Mechanical performance and swelling resistance of silicone rubber reinforced with γ- methacryloxypropyltrimethoxysilane modified halloysite nanotubes

Govindan¹,

Ramabalan²,

Vishvanathperumal³

2023

Preprint

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The halloysite nanotubes (HNTs) experienced a satisfactory surface treatment with γ-methacryloxypropyltrimethoxysilane (γ-MPS), which facilitated interaction with the aluminol and silanol groups found on the edges and surfaces of the nanotubes. The modified HNTs (mHNTs) were used to create silicone rubber vulcanizate nanocomposites. The modification of -MPS was used to improve the interactions between surfaces and tubules. This improvement led to a higher crosslinking density and better HNT dispersion inside the silicone rubber matrix. To assess the effect of mHNTs loading on various features of the resultant rubber nanocomposites, a comprehensive analysis was carried out. The following parameters were studied: cure characteristics, compression set, swelling behavior, abrasion resistance, and mechanical properties. To accomplish this, the oscillating disc rheometer (ODR), solvent immersion technique, DIN abrader, and tensile testing were employed for precise measurements. Overall, the characteristics and performance of the silicone rubber nanocomposites were significantly enhanced by the addition of mHNTs. This study demonstrates the efficacy of mHNTs as reinforcing agents and creates new avenues for strengthening silicone rubber-based material qualities in a variety of applications. The nanocomposites' tensile modulus, strength, and rip strength were all improved by the addition of mHNTs. Furthermore, the silicone rubber/mHNTs nanocomposites exhibit enhanced swelling resistance as a result of the powerful inter-tubular contact they possess. The obtained results were analyzed in relation to the microstructure of the samples, as examined through FESEM analyses.

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Effect of Alumina Modified by Silane on the Mechanical, Swelling and Dielectric Properties of Al2O3/EPDM/SBR Blend Composites

Cited by 9 publications

References 38 publications

Rhodanine‐chitosan hydrogel as a novel antioxidant for acrylonitrile‐butadiene rubber composites

Rhodanine‐chitosan hydrogel as a novel antioxidant for acrylonitrile‐butadiene rubber composites

Investigation of novel polyanilines as new antioxidants for ethylene propylene diene monomer rubber composites

Mechanical performance and swelling resistance of silicone rubber reinforced with γ- methacryloxypropyltrimethoxysilane modified halloysite nanotubes

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