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.

Effect of Silica on Uncompatibilized and Compatibilized Styrene Butadiene Rubber and Nitrile Rubber Blends

Abstract: The present paper investigates the interaction of silica filler in uncompatibilized and compatibilized styrene butadiene rubber/nitrile rubber (SBR/NBR) blends of varying compositions. The use of a dynamic mechanical analyzer as a tool for confirming the compatibility by the addition of dichlorocarbene modified styrene butadiene rubber (DCSBR) in these blends has been described. The addition of silica in uncompatibilized as well as compatibilized blends has been found to be increasing the rheometric-processing characteristics such as maximum viscosity and rate of cure. The magnitude of these values has been found to be higher for compatibilized blends and for 50/50 composition. The optimum cure time has been found to be decreasing with silica loading regardless of the presence of the compatibilizer. The magnitude of optimum cure time has been found to be higher for uncompatibilized system and for the composition with higher SBR content. Enhancement in mechanical properties with the addition of silica has ...

Preparation and properties of carbon nanotube composites with nitrile‐ and styrene‐butadiene rubbers

Abstract: The work deals with the preparation and characterization of elastomer/multiwalled carbon nanotube (CNT) composites. Nitrile-butadiene-rubber (NBR), emulsion styrene-butadiene-rubber (E-SBR) with random segment distribution, and solution styrene-butadiene-rubber (S-SBR) having a blocked styrene content were used as elastomer matrix. The preparation of composites by a masterbatch process was compared to the direct melt-mixing process using two different types of multiwalled CNT. It turned out that extremely low-percolation thresholds of ∼0.2 and 1 wt% CNT can be reached by direct melt mixing of Nanocyl 7000 CNT with S-SBR and NBR, respectively. The effect of CNT on the vulcanization reaction was studied by application of a first-order kinetic model. It can be shown that the rate constants are decreasing with increasing CNT content especially at higher reaction temperatures and that CNT cause a decrease in activation energies. Temperature scanning stress-relaxation measurements were used to prove the reinforcing effect of the CNT, to verify the phase structure of the S-SBR, and to estimate the effect of CNT on crosslink density. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

Method of producing, using and composition of phenolic-type polymer modified asphalts or bitumens

Abstract: A method of producing cross-linked polymer modified asphalt or bitumen. The method includes the steps of combining by agitation polymers chosen from a group consisting of styrene rubber, styrene butadiene rubber, polydiene rubber and polyolefin diene rubber, 80 to 99% by weight of asphalt or bitumen, with the asphalt or bitumen at temperatures of 130° to 230° C. to form a homogeneous mixture. Thereafter, 0.05 to 2.0% by weight of asphalt of a reactive phenol-aldehyde resin is added to the mixture. The reaction is thereafter completed by continuing agitation of the mixture.