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 average molecular weight between crosslinks, Mc, and consequently, the crosslink density values, ve, of the rubber samples are determined, and several thermodynamic parameters of the prepared samples in the solvents used were evaluated.
22 citations
TL;DR: In this paper, temperature dependence of dielectric loss, mechancial loss, and dynamic modulus were measured to study polymer blending, and the results indicated that the blends were microheterogeneous.
Abstract: Temperature dependence of dielectric loss, mechancial loss, and dynamic modulus were measured to study polymer blending. Results were as follows: Dielectric loss and dynamic modulus of NR—BR blends showed two peaks corresponding to NR and BR, indicating that the blends were microheterogeneous. A single, broad maximum absorption band observed for SBR—BR blends indicated that the blends were microhomogeneous. Mill mixing and solution mixing of NR and BR made very little difference in blended state and physical properties. Nearly homogeneous SBR—BR blends can be obtained with a few minutes mill mixing. In vulcanization of NR—BR blends, BR was overcured rapidly due to migration of sulfur and accelerators from NR.
22 citations
TL;DR: In this article, the authors describe Fe3O4-based magnetic elastomer composites with superior mechanical, thermal and magnetic properties via a latex film-forming approach by using carboxylic styrene butadiene rubber (XSBR) as rubber matrix and carboxymethyl chitosan (CMCS) as a dispersant for Fe 3O4.
Abstract: Achieving fillers well-distributed in the polymeric matrix via a green and eco-friendly method is critical for composites preparation to gain considerable comprehensive properties. In this work, we describe Fe3O4-based magnetic elastomer composites with superior mechanical, thermal and magnetic properties via a latex film-forming approach by using carboxylic styrene butadiene rubber (XSBR) as rubber matrix and carboxymethyl chitosan (CMCS) as a dispersant for Fe3O4. It was found that CMCS promoted the dispersion of Fe3O4 remarkably and improved the interfacial compatibility between Fe3O4 and XSBR matrix. Simultaneously, the XSBR/CMCS/Fe3O4 composite with 25 wt% Fe3O4 displayed a higher tensile strength was about 2.5 times of the neat XSBR. And the saturation magnetization of the XSBR/CMCS/Fe3O4 composite was about 1.2 times that of XSBR/Fe3O4 at the same filler content. Therefore, this report provided a new solution to uniformly disperse Fe3O4 in rubber composites by latex film-forming method without any dispersion guarantee measures.
22 citations
Patent•
17 May 2012TL;DR: A rubber composition for a tire tread includes a modified diene rubber comprising a styrene butadiene rubber and/or a polybutadiene compound, having a functional group such as an amino group or a hydroxyl group, silica, a silane coupling agent, a lignin derivative, and a carbon masterbatch as discussed by the authors.
Abstract: A rubber composition for a tire tread includes a modified diene rubber comprising a styrene butadiene rubber and/or a polybutadiene rubber, having a functional group such as an amino group or a hydroxyl group, silica, a silane coupling agent, a lignin derivative, and a carbon masterbatch The carbon masterbatch comprises a styrene butadiene rubber, and carbon black having iodine adsorption of from 60 to 130 g/kg, and a ratio of the amount (B) of a rubber in the carbon masterbatch to the amount (A) of the modified diene rubber is B/A=025 to 1 The total amount of the carbon black and the silica is from 40 to 100 parts by mass per 100 parts by mass of a rubber component, the proportion of the silica in fillers is from 25 to 80% by mass, and the amount of the lignin derivative is from 01 to 10 parts by mass
22 citations
TL;DR: In this article, the effect of frequency, filler loading, temperature, and applied pressure on the AC conductivity, permittivity, and loss factor of flexible conductive polymer composites was studied.
Abstract: Flexible conductive polymer composites were prepared using styrene–butadiene rubber (SBR) as a matrix and conductive carbon black as filler. The filler loading was varied from 10 to 60 phr. The effect of frequency, filler loading, temperature, and applied pressure on the AC conductivity, permittivity, and loss factor of the composites was studied. The AC conductivity of low and high loaded composites was found to be frequency dependent and independent respectively. The permittivity and the loss factor were continuously decreasing with increasing frequency. The increase in filler loading increased the AC conductivity, dielectric constant, and loss factor of the composites. Increase in temperature imposed increase in conductivity and permittivity of the composites. With increasing applied pressure the properties showed exponential increase. The effect of time under a constant compressive stress was studied and dielectric relaxation times were evaluated. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 986–995, 2007
22 citations