New insight into structure-property relationships of natural rubber and styrene-butadiene rubber nanocomposites filled with MWCNT

Bernal-Ortega, Pilar; Bernal, M. Mar; Jiménez, Antonio González; Posadas, Paula; Navarro, Rodrigo; Valentín, Juan López

doi:10.1016/j.polymer.2020.122604

Cited by 27 publications

(43 citation statements)

References 71 publications

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“…The analysis of the so-obtained normalized DQ build-up curve ( I nDQ = I DQ / I ΣMQ ) by using a numerical inversion procedure based on fast Tikhonov regularization is used to obtain the actual distribution function of residual couplings [ 64 ], D res , which is directly related to the spatial distribution of rubber network constraints in the sample [ 60 , 65 ]. More details about the 1 H DQ-NMR measurement and analysis procedure applied to the CNT-NR samples are given in the Supporting Information section in the reference [ 20 ].…”

Section: Methodsmentioning

confidence: 99%

“…This phenomenon is the main cause of their poor dispersion when they are used as filler in polymer matrices, reducing the expected enhancement of the properties of the final compound [ 1 , 18 , 19 ]. In this framework, in a previous study [ 20 ], it was demonstrated that these promising materials could have some limitations in applications in high-performance tire tread compounds (mainly related to the rolling resistance and fuel consumption) because of the difficulty of dispersion of CNTs in rubber matrices (high filler networking), the strong influence of CNTs on the vulcanization process (low crosslink density and high network defects), and the nature of filler–rubber interactions (high energy dissipation associated to the rupture of filler–rubber interactions at high strain amplitudes). For these reasons, the main aim of this work was to minimize these limitations, thus obtaining enhanced rubber–CNT compounds with reduced rolling resistance properties.…”

Section: Introductionmentioning

confidence: 99%

“…The sulfur-functionalization was performed with the purpose to obtain covalent rubber/filler interactions as well as a more efficient use of the sulfur in the vulcanization process. This novel approach for obtaining rubber compounds was selected to overcome the reactivity problems (absorption of the sulfur on the surface of the CNTs) during the vulcanization process observed in a previous work [ 20 ], without the need to introduce new ingredients into the formulation.…”

Section: Introductionmentioning

confidence: 99%

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Sulfur-Modified Carbon Nanotubes for the Development of Advanced Elastomeric Materials

et al. 2021

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The outstanding properties of carbon nanotubes (CNTs) present some limitations when introduced into rubber matrices, especially when these nano-particles are applied in high-performance tire tread compounds. Their tendency to agglomerate into bundles due to van der Waals interactions, the strong influence of CNT on the vulcanization process, and the adsorptive nature of filler–rubber interactions contribute to increase the energy dissipation phenomena on rubber–CNT compounds. Consequently, their expected performance in terms of rolling resistance is limited. To overcome these three important issues, the CNT have been surface-modified with oxygen-bearing groups and sulfur, resulting in an improvement in the key properties of these rubber compounds for their use in tire tread applications. A deep characterization of these new materials using functionalized CNT as filler was carried out by using a combination of mechanical, equilibrium swelling and low-field NMR experiments. The outcome of this research revealed that the formation of covalent bonds between the rubber matrix and the nano-particles by the introduction of sulfur at the CNT surface has positive effects on the viscoelastic behavior and the network structure of the rubber compounds, by a decrease of both the loss factor at 60 °C (rolling resistance) and the non-elastic defects, while increasing the crosslink density of the new compounds.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sulfur-Modified Carbon Nanotubes for the Development of Advanced Elastomeric Materials

et al. 2021

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“…However, its properties are strongly reliant on the reinforcements [90]. Researchers [24,41,68,78,79] have reinforced the NR-SBR blend, and the results showed that MWCNTs increased the UTS, M, storage modulus, and thermal stability of the blend. This could be due to good dispersion of MWCNTs into the blend and a strong interaction between MWCNTs and the matrices of both rubbers, indicating that MWCNTs have good affinity for both NR and SBR.…”

Section: Styrene Butadiene Rubber-cnts Compositesmentioning

confidence: 99%

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Gumede¹,

Carson²,

Hlangothi³

2021

Carbon Nanotubes - Redefining the World of Electronics

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The field of electronics involves complex systems where the active and passive electronic devices are integrated on the rubber substrate, e.g., silicone (Q), which provides, through potting, a strong assembly of these devices on the circuit board. Several other rubbers are employed in the field to strengthen, insulate and seal the components of the electronic machines and instruments, and therefore protect them against damage. These rubbers are typically strengthened and toughened using carbon black (CB). However, due to its noticeable drawbacks, recent research in the field of rubber and electronics has suggested the use of carbon nanotubes (CNTs) as alternative reinforcing fillers to produce electronics rubber composites that do not only have enhanced electrical conductiv¬ity, thermal stability, electromagnetic interference (EMI) shielding, weatherability and insulation properties, but also offer outstanding stretchability, bendability and tear strength under frequent elastic deformation. These performances are similar for both single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) in both the functional and structural composites. Although SWCNTs can result in relatively better homogeneity than MWCNTs, most rubbers often constitute MWCNTs because they are relatively cheaper. The great potential of rubber-CNTs composites being extensively used in the field of electronics is explored in this chapter.

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“…Particularly, in the case of electric vehicle (EV) technology, the tire with low thickness, high durability and electrically conducting are essential. Nowadays, many types of natural rubber (NR) [ 1 ] and synthetic rubber (SR) have been investigated such as styrene-butadiene rubber (SBR) [ 2 ], butadiene rubber (BR) [ 3 ] and their blends including NR/SBR, SBR/BR and NR/BR/SBR [ 4 , 5 , 6 ]. This is attributed to the superior elasticity and flexibility of NR and BR [ 7 , 8 ] along with the SBR which has well rolling properties and wet fraction due to π–π interaction of existing benzene ring in the molecular structure [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Combination of Self-Healing Butyl Rubber and Natural Rubber Composites for Improving the Stability

et al. 2021

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The self-healing composites were prepared from the combination of bromobutyl rubber (BIIR) and natural rubber (NR) blends filled with carbon nanotubes (CNT) and carbon black (CB). To reach the optimized self-healing propagation, the BIIR was modified with ionic liquid (IL) and butylimidazole (IM), and blended with NR using the ratios of 70:30 and 80:20 BIIR:NR. Physical and chemical modifications were confirmed from the mixing torque and attenuated total reflection-fourier transform infrared spectroscopy (ATR-FTIR). It was found that the BIIR/NR-CNTCB with IL and IM effectively improved the cure properties with enhanced tensile properties relative to pure BIIR/NR blends. For the healed composites, BIIR/NR-CNTCB-IM exhibited superior mechanical and electrical properties due to the existing ionic linkages in rubber matrix. For the abrasion resistances, puncture stress and electrical recyclability were examined to know the possibility of inner liner applications and Taber abrasion with dynamic mechanical properties were elucidated for tire tread applications. Based on the obtained Tg and Tan δ values, the composites are proposed for tire applications in the future with a simplified preparation procedure.

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New insight into structure-property relationships of natural rubber and styrene-butadiene rubber nanocomposites filled with MWCNT

Cited by 27 publications

References 71 publications

Sulfur-Modified Carbon Nanotubes for the Development of Advanced Elastomeric Materials

Sulfur-Modified Carbon Nanotubes for the Development of Advanced Elastomeric Materials

Carbon Nanotubes as Reinforcing Nanomaterials for Rubbers Used in Electronics

Combination of Self-Healing Butyl Rubber and Natural Rubber Composites for Improving the Stability

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