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.

Living Anionic Polymerization of 1,3-Cyclohexadiene with the n-Butyllithium/N,N,N‘,N‘-Tetramethylethylenediamine System. Copolymerization and Block Copolymerization with Styrene, Butadiene, and Isoprene

Abstract: The n-butyllithium/N,N,N‘,N‘-tetramethylethylenediamine system has been found to polymerize 1,3-cyclohexadiene to produce a “living” polymer having a narrow molecular weight distribution. Ternary block copolymers with narrow molecular weight distribution could be synthesized from 1,3-cyclohexadiene, styrene, and butadiene with very high efficiency. The relative reactivity of 1,3-cyclohexadiene, styrene, and isoprene in the copolymerization was found to be in the order styrene, isoprene, and 1,3-cyclohexadiene. In contrast, the relative reactivity of the propagating species of living poly(1,3-cyclohexadiene) was higher than that of the propagating species of living polystyrene.

Difference in bound rubber formation of silica and carbon black with styrene-butadiene rubber

Abstract: Formation of bound rubber is affected by the physical structure and surface chemistry of filler and the property of rubber Variation of the bound rubber formation in styrene-butadiene rubber compounds filled with silica and/or carbon black was studied Influence of temperature on extraction of loosely bound rubber was also investigated For the both silica and carbon black-filled compounds, the bound rubber content increases with increase in the silica content ratio The bound rubber content decreases with increasing the extracting temperature The loosely bound rubber content of the silica-filled compound is higher than that of the carbon black-filled one Activation energy for the extraction of the unbound and loosely bound rubbers becomes higher as the total filler content increases The activation energy of the silica-filled compound is higher (almost double the value) than for the carbon black-filled one Copyright­© 2002 John Wiley & Sons, Ltd

Shear-induced orientation transitions in triblock copolymer styrene-butadiene-styrene with cylindrical domain morphology

Abstract: Shear-induced alignment of phase-separated domains was studied by TEM and SAXS in a SBS triblock copolymer with a phase-separated morphology of hexagonally packed cylinders of poly(styrene) in a poly(butadiene) matrix. Starting with an ordered structure, where the cylinders were aligned with a common director throughout the sample, a shear flow perpendicular to this director was found to rotate the cylinder orientation by 90° into the shear direction. At all observed strains, the hexagonal faces preferred to orient parallel to the shear plane