Mechanical and Viscoelastic Properties of Natural Rubber/ Reclaimed Rubber Blends

Farahani, T Darestani; Bakhshandeh, G. R.; Abtahi, Mojtaba

doi:10.1007/s00289-006-0508-4

Cited by 25 publications

(9 citation statements)

References 24 publications

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“…As can be seen in Table 3 and Figure 2 , the tensile strength and Young’s modulus values increased with the increasing SWCNT content, and the elongation at break values decreased. The same trends were observed in [ 16 , 17 , 18 , 19 , 20 ]. The increase in the tensile strength and the Young’s modulus could be attributed to good dispersion and interatomic interaction between the rubber matrix and the nanofiller, as the CNTs (with their high aspect ratio) could improve the crosslinking of the compound [ 58 ].…”

Section: Discussionsupporting

confidence: 82%

“…Rubber nanocomposites reinforced with CNTs have been investigated in order to achieve required dynamic mechanical properties, gas resistance, flammability resistance, and thermal and electrical conductivity [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Several studies [ 14 , 15 , 16 , 17 , 18 ] have reported increases in tensile strength, elastic modulus, and hardness and decreases in the elongation at break of natural rubber composites reinforced with CNTs. In addition to improving the mechanical properties, the incorporation of conductive fillers into rubbers that are thermal and electrical insulators can produce composites with certain electrical conductivities.…”

Section: Introductionmentioning

confidence: 99%

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Testing of Rubber Composites Reinforced with Carbon Nanotubes

Bakošová

Bakošová²

2022

Polymers

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Carbon nanotubes (CNTs) have attracted growing interest as a filler in rubber nanocomposites due to their mechanical and electrical properties. In this study, the mechanical properties of a NR/BR/IR/SBR compound reinforced with single-wall carbon nanotubes (SWCNTs) were investigated using atomic force microscopy (AFM), tensile tests, hardness tests, and a dynamical mechanical analysis (DMA). The tested materials differed in SWCNT content (1.00–2.00 phr) and were compared with a reference compound without the nanofiller. AFM was used to obtain the topography and spectroscopic curves based on which local elasticity was characterized. The results of the tensile and hardness tests showed a reinforcing effect of the SWCNTs. It was observed that an addition of 2.00 phr of the SWCNTs resulted in increases in tensile strength by 9.5%, Young’s modulus by 15.44%, and hardness by 11.18%, while the elongation at break decreased by 8.39% compared with the reference compound. The results of the temperature and frequency sweep DMA showed higher values of storage and loss moduli, as well as lower values of tangent of phase angle, with increasing SWCNT content.

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Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Testing of Rubber Composites Reinforced with Carbon Nanotubes

Bakošová

Bakošová²

2022

Polymers

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“…Their relatively high density contributes to an increase in the specific gravity of rubber compounds. Furthermore, their efficacy in reinforcing rubber materials is most pronounced when employed at substantial loadings [7][8][9]. It is essential to note that, in the context of NR vulcanizates, an increase in CB ratios is accompanied by considerable heat build-up, which, in turn, adversely affects various performance attributes of vehicle tires.…”

Section: Introductionmentioning

confidence: 99%

Improved Heat Dissipation of NR/SBR-Based Tire Tread Compounds via Hybrid Fillers of Multi-Walled Carbon Nanotube and Carbon Black

Kodal,

Yazıcı Çakır,

Yıldırım

et al. 2023

Polymers

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The development of thermally conductive rubber nanocomposites for heat management poses a formidable challenge in numerous applications, notably within the realm of tire technology. Notably, rubber materials are characterized by their inherently low thermal conductivity. Consequently, it becomes imperative to incorporate diverse conductive fillers to mitigate the propensity for heat build-up. Multi-walled carbon nanotubes (MWCNTs), as reinforcement agents within the tire tread compounds, have gained considerable attention owing to their extraordinary attributes. The attainment of high-performance rubber nanocomposites hinges significantly on the uniform distribution of MWCNT. This study presents the influence of MWCNTs on the performance of carbon black (CB)-reinforced natural rubber (NR)/styrene butadiene rubber (SBR) tire compounds prepared via high shear melt mixing. Morphological analysis showed a good distribution of MWCNTs in the NR/SBR/CB compound. The vulcanization parameters, such as the maximum and minimum torque, cross-linking density, hardness, abrasion resistance, tensile strength, and Young modulus, exhibited a progressive improvement with the addition of MWCNT. Remarkably, adding MWCNT into CB improved the heat conductivity of the NR/SBR/CB compounds, hence decreasing the heat build-up. A percolation mode was also proposed for the hybrid carbon fillers based on the data obtained.

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“…[ 34,35 ] While PLGA fibres are known to allow cell attachment without further biomodification through their hydrophobicity and rough surface, [ 36 ] they release acidic products over time and cause a drop in pH due to hydrolytic degradation. [ 37,38 ] In contrast, no such cell adhesion is possible on bioinert PEG microgels, while no harmful degradation products are obtained from them. [ 39 ] Owing to their bioinertness, we could conclude that the alignment of cells in Anisogels containing oriented microgels was caused by the different mechanical cues sensed by cells in the direction of alignment as opposed to the direction perpendicular to it.…”

Section: Introductionmentioning

confidence: 99%

How do the Local Physical, Biochemical, and Mechanical Properties of an Injectable Synthetic Anisotropic Hydrogel Affect Oriented Nerve Growth?

Babu

Chen

Vedaraman

et al. 2022

Adv Funct Materials

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As an injectable tissue regenerative platform, Anisogel aims to recapitulate the complex and anisotropic architecture of native extracellular matrix by the use of magneto‐responsive microgels, which are oriented under a low magnetic field of ≈100 mT, while a surrounding hydrogel matrix cross‐links around them. This system promotes the oriented growth of neurons when cultured in vitro. In this study, how the local microgel properties affect neurite outgrowth and orientation is aimed to understand using dorsal root ganglia from chicken embryos. When the surrounding matrix is a synthetic poly(ethylene glycol) hydrogel, the microgel concentration and length required to achieve oriented nerve growth is higher compared to fibrin‐based Anisogels. Microgels should be stiffer than the matrix for cells to sense the mechanical anisotropy but a wide range of microgel stiffness leads to similar cell alignment and growth. On the other hand, modification of the microgels with common extracellular matrix molecules enhances nerve growth but deteriorates nerve alignment compared to bioinert microgels in a cell adhesive surrounding gel. Finally, covalently coupling these microgels to the surrounding matrix reduces both cellular orientation and outgrowth suggesting a reduction in the ability of cells to sense the anisotropy.

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Mechanical and Viscoelastic Properties of Natural Rubber/ Reclaimed Rubber Blends

Cited by 25 publications

References 24 publications

Testing of Rubber Composites Reinforced with Carbon Nanotubes

Testing of Rubber Composites Reinforced with Carbon Nanotubes

Improved Heat Dissipation of NR/SBR-Based Tire Tread Compounds via Hybrid Fillers of Multi-Walled Carbon Nanotube and Carbon Black

How do the Local Physical, Biochemical, and Mechanical Properties of an Injectable Synthetic Anisotropic Hydrogel Affect Oriented Nerve Growth?

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