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 relationship between the crack energy at the crack tip and the critical strain energy release rate Tcrit to propagate the tear is examined, where the level of cross linking is varied to modify the kinetics of the strain induced crystal formation, and carbon black is incorporated into some of the NR and SBR compounds.
37 citations
TL;DR: Many conventional solvents do not sufficiently dissolve cross-linked polymers such as styrene−butadiene rubber (SBR) to allow efficient depolymerization as mentioned in this paper.
Abstract: Many conventional solvents do not sufficiently dissolve cross-linked polymers such as styrene−butadiene rubber (SBR) to allow efficient depolymerization. Supercritical and near-critical water provi...
37 citations
TL;DR: The effect of grafting modification of the fillers on the formation of bound rubber and its two components is discussed in this article, where two relaxation times are attributed to the occurrence of tightly and loosely bound rubber components.
Abstract: Proton spin–spin relaxation time measurements have been performed at 300 and 400 MHz on bound rubber-filler mixes resulting from the solvent extraction of silica-filled and silicafilled-modified polybutadiene, on the one hand, and of carbon black-filled and carbon blackfilled-modified styrene butadiene rubber, on the other hand. Two relaxation times are observed for all samples. They are ascribed to the occurrence of tightly and loosely bound rubber components, respectively. The effect of the grafting modification of the fillers on the formation of bound rubber and its two components is discussed. © 1992 John Wiley & Sons, Inc.
37 citations
TL;DR: Methyl acrylate, methacrylic acid, and acrylic acid have been graft copolymerized onto styrene-butadiene block copolymers as mentioned in this paper, and all three monomers react through the macroradical interacting with the double bond of butadiene.
37 citations
TL;DR: The micelle core size is fairly independent of the copolymer concentration and, as the temperature is raised, at first remains unchanged but then increases rapidly before it finally dissolves completely.
Abstract: : The small-angle X-ray scattering technique is utilized to study the formation of micelles in mixtures containing polybutadiene homopolymer (Mn = 2350) with much smaller amounts (0.5 to 8 wt%) of styrene-butadiene diblock copolymer (Mn = 25000, 52.2 wt% styrene). The following quantities, characterizing the structure of the micelle core consisting of styrene blocks swollen with polybutadiene, have been evaluated as a function of temperature and the copolymer concentration: the radius of gyration of the core, the degree of swelling of the core, the number of block copolymer molecules forming a micelle, and the volume of a core. In addition, the critical micelle concentration (i.e., the minimum copolymer concentration necessary for micelle formation) and the number density of micelles as a function of the concentration were also determined. The degree of swelling of micelle cores by polybutadiene increases steadily with increasing temperature. The micelle core size is fairly independent of the concentration and, as the temperature is raised, at first remains unchanged but then increases rapidly before it finally dissolves completely. The temperature of dissolution increases with concentration of the copolymer. The micelle core volumes, determined by two independent methods (one by the Guinier analysis and the other from the ratio I(O)/Q), agree well with each other.
37 citations