Topic
Styrene-butadiene
About: Styrene-butadiene is a research topic. Over the lifetime, 5568 publications have been published within this topic receiving 62099 citations. The topic is also known as: styrene-butadiene rubber & SBR.
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TL;DR: In this paper, the effect of SBR latex on the rheological property and pore structure of cement paste was investigated, and a significant linear relation was obtained between the air content and the fluidity of the cement paste.
Abstract: Styrene-butadiene rubber (SBR) latex is beneficial to the workability of cement-based materials, but the mechanism remains unclear. This study aims to investigate the effect of SBR latex on the rheological property and pore structure of cement paste. The results showed that the fluidity of the modified cement-based material was improved, and a significant linear relation was obtained between the air content and the fluidity of the cement paste. The yield stress and viscosity of the paste decreased with increasing SBR latex content, and the modified cement paste exhibited shear-thinning behavior. In addition, the SBR latex can deteriorate the pore structure of the hardened cement paste at 3 days due to the hydrophobic groups easily trapping the air into the paste. Compared with that of the ordinary Portland cement paste, the number of pores (size range of 0.1 μm–1 μm and 10 μm-200 μm) in the SBR-modified cement paste was clearly increased. However, the lowest porosity was achieved at 28 days, when 2% SBR was used due to the filling effect of the hydration products and polymer particles. The throat/pore ratio and fractal dimension increased with the SBR latex content, illustrating the increasing of ink-bottle pores with a rough surface.
45 citations
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TL;DR: In this paper, the effect of two types of organic fibers: date-palm fibers and textile fibers, in combination with styrene butadiene rubber (SBR) polymer on the properties of OGFC mixes was evaluated.
Abstract: Open-graded friction course (OGFC) or porous asphalt mixtures are special mixes used for improving the surface friction, increasing surface permeability, and reducing pavement noise. The mix consists mostly of coarse size aggregate with little fines. This study was conducted to evaluate the effect of two types of organic fibers: date-palm fibers and textile fibers, in combination with styrene butadiene rubber (SBR) polymer on the properties of OGFC mixes. A total of six different mixes were evaluated. Mix designs were performed according to the design procedure proposed by the National Center of Asphalt Technology (NCAT) for a range of 4.5–6.5% asphalt content. One-way ANOVA using the Tukey method of multiple comparisons was used to test the effect of the modifier and/or stabilizer on abrasion as an indication of raveling potential as well as draindown. The results indicated that the asphalt mix containing date-palm fibers and SBR polymer at 5.0% and the asphalt mix containing textile fibers and SBR polym...
45 citations
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TL;DR: In this paper, a slow pyrolysis biochar that contained 89% carbon and <2% ash was used as filler for styrene-butadiene rubber (SBR).
Abstract: Birchwood feedstock was used to make slow pyrolysis biochar that contained 89% carbon and <2% ash. This biochar was blended with carbon black (CB) as filler for styrene–butadiene rubber (SBR). Comp...
45 citations
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TL;DR: In this article, improvement of the properties of silica-filled styrene-butadiene rubber (SBR) compounds was studied using acrylonitrile, butadiene (NBR) rubber.
Abstract: Since silica has strong filler-filler interactions and adsorbs polar materials, a silica-filled rubber compound has a poor dispersion of the filler and poor cure characteristics. Improvement of the properties of silica-filled styrene-butadiene rubber (SBR) compounds was studied using acrylonitrile-butadiene rubber (NBR). Viscosities and bound rubber contents of the compounds became lower by adding NBR to the compound. Cure characteristics of the compounds were improved by adding NBR. Physical properties such as modulus, tensile strength, heat buildup, abrasion, and crack resistance were also improved by adding NBR. Both wet traction and rolling resistance of the vulcanizates containing NBR were better than were those of the vulcanizate without NBR. The NBR effects in the silica-filled SBR compounds were compared with the carbon black-filled compounds.
45 citations
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TL;DR: In this paper, a supramolecular network based on carboxylic styrene butadiene rubber (XSBR) and chitosan (CTS) is prepared through a solution mixing process.
Abstract: A novel supramolecular network based on carboxylic styrene butadiene rubber (XSBR) and chitosan (CTS) is prepared through solution mixing process. XSBR molecular chains have strong interactions with extended CTS via the formation of ammonium carboxylates bridging crosslinks and hydrogen bonds, which efficiently prevent extended CTS from reagglomerating. Compared with CTS nanoparticles, unfolded CTS expose more amino and hydroxyl groups to XSBR, which results in a denser and stronger network structure. However, because of the rigidity of CTS molecule, unfolded CTS construct a rigid framing in the supramolecular network, which reduces the extensibility of the XSBR/CTS composites. Interestingly, the solution mixing retains abundant air bubbles in the XSBR/CTS solution, which turns out a porous composite.
45 citations