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 article, the authors show that a concrete with a good air void spacing factor and a low water-cement ratio can be almost as resistant to salt scaling as latex-modified concrete.
Abstract: Freezing and thawing tests in the presence of a 2.4% NaCl solution were carried out on normal concretes and styrene butadiene (SBR) rubber latex concretes in accordance with ASTM C 672. The results indicate that SBR in concrete improves very significantly the resistance of the concrete surface to freezing and thawing in the presence of deicer salts. This improvement depends on the quantity of SBR, the air void spacing factor, and the water/cement ratio. Only 2 of the 9 standard mixtures, but 12 out of the 17 modified concrete mixtures had mass losses lower than 1 kg/sq m at 100 cycles. The results also show that a conventional concrete with a good air-void spacing factor and a low water-cement ratio can be almost as resistant to salt scaling as latex-modified concrete.
25 citations
TL;DR: In this paper, a modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction.
Abstract: The high gas barrier property of a rubber composite is of great significance for reducing the exhaust gas emissions due to tire rolling resistance and hence the contribution this factor makes to environmental protection. Enhanced covalent interfaces and crosslinked networks are crucial to the gas barrier property of rubber composites. In this research, γ-mercaptopropyltriethoxysilane (MPS) modified GO (MGO)/styrene-butadiene rubber (SBR) composites were prepared by a synergetic strategy of latex compounding method and thiol-ene click reaction. It was found that the mercapto groups in MGO reacted with the vinyl groups in SBR molecules through thiol-ene click reaction during the crosslinking process at 150 °C, thus forming strong chemical interactions at the interface in the form of GO-MPS-rubber and enhanced crosslinked networks. Meanwhile, the strong interface promoted the dispersion of MGO in SBR. The uniform dispersion of MGO, strong interface between MGO and SBR molecules and enhanced crosslinked networks resulted in improved mechanical and gas barrier properties. When filling 5 phr fillers, the tensile strength and gas barrier properties of an MGO/SBR composite improved by 19.0% and 37.5%, respectively, relative to the comparing GO/SBR composite.
25 citations
Patent•
23 Apr 2013
TL;DR: In this paper, a vegetable oil extended rubber containing soy oil and tire with a component of such oil-extended rubber is described, and the rubber is shown to have good performance.
Abstract: This invention relates to vegetable oil extended rubber containing soy oil and tire with a component of such oil extended rubber.
25 citations
TL;DR: In this paper, the mechanism and optimum conditions for the reduction of residual double bonds in styrene-butadiene rubber (SBR) latex by hydrogenating the poly butadiene in the latex form were studied.
Abstract: The mechanism and the optimum conditions for the reduction of residual double bonds in styrene-butadiene rubber (SBR) latex by hydrogenating the polybutadiene in the latex form were studied. The hydrogenation involves a copper ion (II)-catalyzed procedure in which diimide hydrogenation agent is generated in situ at the surfaces of latex particles by a hydrazine/hydrogen peroxide redox system. The surface density of the copper ion in particle surfaces was found to be a crucially important parameter in controlling the degree of hydrogenation. The distribution of the double bonds in the latex particles after the hydrogenation was found to be dependent on the particle size and the extent of crosslinking in the particles. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 2047–2056, 1997
25 citations
TL;DR: In this article, the results showed that the increased thermal stability of SBR/NBRr reinforced at 85/15 blend with different ratios of a carbon black/silica (CB/Sil) hybrid filler were tested either with or without the silane coupling agent, Si69.
Abstract: The utilization of nitrile glove waste will spark a great deal of interest in the rubber industry in developing cost-effective techniques to convert waste and used rubber into a processable form. Blends of styrene butadiene rubber/recycled acrylonitrile butadiene rubber (SBR/NBRr) reinforced at 85/15 blend with different ratios of a carbon black/silica (CB/Sil) hybrid filler (50/0, 40/10, 30/20, 20/30, 40/10, 0/50 phr) were tested either with or without the silane coupling agent, Si69. Results showed that the increased thermal stability of blends with Si69 is highly related to the formation of crosslinks between the filler. Thermogravimetric (TG) thermograms showed that the percentage of char residue for blends with Si69 was higher than without Si69. The differential scanning calorimetry (DSC) thermograms of both blends revealed a glass transition temperature (Tg) between 65.0°C and 66.9°C. At all blend ratios, the fatigue life of blends with Si69 was better than blends without Si69. After six months’ exp...
25 citations