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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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Journal ArticleDOI
TL;DR: In this article, a triblock copolymerization of S with B catalyzed by C5Me5TiMe3/B(C6F5)3/trioctylaluminum (Al(oct)3) under controllable polymerization conditions is presented.
Abstract: Crystalline styrene−butadiene−styrene (SBS) triblock copolymers consisting of elastic cis-polybutadiene (cis-PB) chemically bonded with crystallizable syndiotactic polystyrene (syn-PS) were synthesized through a stereospecific sequential triblock copolymerization of S with B catalyzed by C5Me5TiMe3/B(C6F5)3/trioctylaluminum (Al(oct)3) under controllable polymerization conditions. The first polymerization step was conducted at −25 °C, yielding syn-PS with controllable molecular weight by changing the polymerization time. The second one was started with the addition of excess B to the progressing syn-PS polymerization at −40 °C, yielding syn-PS/cis-PB diblock copolymer with high block efficiencies. The third one was conducted at −25 °C just by removal of the unreacted B in order to enhance the reinsertion and propagation of the remained S, yielding crystalline SBS triblock copolymers with relatively high PS compositions. The livingness of the whole polymerization process was confirmed through a linear incre...

54 citations

Journal ArticleDOI
TL;DR: In this article, rubber-based nanocomposites were prepared using octadecyl amine modified Na-montmorillonite clay (OC) and Styrene Butadiene Rubber (SBR) having styrene content of 15, 23 and 40% respectively.
Abstract: Rubber based nanocomposites were prepared using octadecyl amine modified Na-montmorillonite clay (OC) and Styrene Butadiene Rubber (SBR) having styrene content of 15, 23 and 40% respectively and Acrylonitrile Butadiene Rubber (NBR) having acrylonitrile content of 19, 34 and 50% respectively. The morphology of the nanocomposites was investigated using Atomic Force Microscopy (AFM), Transmission Electron Microscopy (TEM) and X-ray Diffraction Technique (XRD). The TEM photographs of the unmodified clay loaded SBR nanocomposite showed agglomeration, while the modified clay loaded SBRs of all the grades revealed complete exfoliation. The NBRs, on the other hand, gave unexfoliated and intercalated clay structures both with the unmodified and the modified clays, except in the case of NBR having 19% of acrylonitrile and 4% of the unmodified clay. The AFM data were in good accord with the TEM results. The particle dimensions were within the range of 10–20 nm in the case of SBR sample having 4 parts of the modified clay. NBRs having 34 and 50% acrylonitrile contents and 4 parts of OC showed clay particles ranging from 50–70 nm and 70–100 nm respectively. On comparison of the rubbers having different nature and contents of functional groups and filler loadings, significant effect on the morphology of the composite was observed. The nature of solvent used to prepare the nanocomposites also affected the morphology. XRD data further corroborated the facts in all the above cases.

54 citations

Journal ArticleDOI
TL;DR: A functional ionic liquid (IL), 1-methylimidazolium methacrylate (MimMa), was synthesized for modify- ing styrene butadiene rubber (SBR)/silica composites.
Abstract: A novel functional ionic liquid (IL), 1-methylimidazolium methacrylate (MimMa), was synthesized for modify- ing styrene butadiene rubber (SBR)/silica composites. MimMa was found to be readily polymerized via the initiated radi- cal mechanism and could be analogously grafted onto rubber chains during vulcanization. Substantial hydrogen bonding between polymerized MimMa (poly(MimMa)) and silica can facilitate the silica dispersion and improve the SBR/silica interfacial bonding. Filler networking, curing behavior, silica dispersion and mechanical performance of the modified SBR/silica composites were studied. With a low concentration of MimMa, remarkable improvements in the interfacial interactions and mechanical properties were achieved which was attributed to the improved silica dispersion and strength- ened interfacial bonding induced by MimMa. A modified interphase structure was accordingly proposed and related to the mechanical performance of the modified SBR/silica composites.

54 citations

Journal ArticleDOI
Jin Sun1, Yihu Song1, Qiang Zheng1, Hong Tan, Jie Yu, Hong Li1 
TL;DR: In this article, the reinforcement and nonlinear viscoelastic behavior have been investigated for silica (SiO2) filled solution-polymerized styrene butadiene rubber (SSBR).
Abstract: The reinforcement and nonlinear viscoelastic behavior have been investigated for silica (SiO2) filled solution-polymerized styrene butadiene rubber (SSBR). Experimental results reveal that the nonlinear viscoelastic behavior of the filled rubber is similar to that of unfilled SSBR, which is inconsistent with the general concept that this characteristic comes from the breakdown and reformation of the filler network. It is interesting that the curves of either dynamic storage modulus (G′) or loss tangent (tan δ) versus strain amplitude (γ) for the filled rubber can be superposed, respectively, on those for the unfilled one, suggesting that the primary mechanism for the Payne effect is mainly involved in the nature of the entanglement network in rubbery matrix. It is believed there exists a cooperation between the breakdown and reformation of the filler network and the molecular disentanglement, resulting in enhancing the Payne effect and improving the mechanical hysteresis at high strain amplitudes. Moreover, the vertical and the horizontal shift factors for constructing the master curves could be well understood on the basis of the reinforcement factor f(φ) and the strain amplification factor A(φ), respectively. The surface modification of SiO2 causes a decrease in f(φ), which is ascribed to weakeness of the filler–filler interaction and improvement of the filler dispersion. However, the surface nature of SiO2 hardly affects A(φ). © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2594-2602, 2007

54 citations

Journal ArticleDOI
TL;DR: In this article, polystyrene, polybutadiene and diblock styrene-butadienes copolymers have been prepared, using sec-butyllithium as initiator, and characterised.

53 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023118
2022229
2021159
2020239
2019313
2018348