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 potential use of recycled linear low-density polyethylene (RLLDPE) as a substitute for virgin polymers to produce hybrid polymer modified bitumen (PMB) was investigated.
40 citations
TL;DR: In this article, two kinds of weak boundary layers (WBL) in synthetic vulcanized styrene-butadiene rubber are described, i) WBL produced by the presence of anti-adhesion compounds of the rubber formulation (zinc stearate, microcrystalline paraffin wax).
Abstract: In this paper two kinds of weak boundary layers (WBL) in synthetic vulcanized styrene-butadiene rubber are described. i) WBL produced by the presence of antiadhesion compounds of the rubber formulation (zinc stearate, microcrystalline paraffin wax). These WBL cannot be effectively removed by solvent wiping, whether followed by washing with an ethanol/water mix or not. Although this treatment allowed a significant removal of zinc stearate, the paraffin wax concentration on the surface was not greatly reduced, thus, poor adhesion of rubber was obtained. Chlorination with small amounts of ethyl acetate (EA) solutions of trichloro isocyanuric acid (0.5–5 wt% TCI/EA) and/or an extended halogenation treatment increased the adhesion strength and effectively eliminated the zinc stearate from the rubber surface. If an additional heat treatment (50°C/24h) of the chlorinated rubber was also carried out, the WBL was more effectively eliminated and the resulting adhesion was independent of the amount of chlor...
40 citations
TL;DR: In this paper, a small-angle X-ray scattering technique was used to determine the characteristics of micelles formed in the mixtures containing a low molecular weight polybutadiene and a styrene-butane diblock copolymer.
Abstract: : The small-angle X-ray scattering technique is utilized to determine the characteristics of micelles formed in the mixtures containing a low molecular weight polybutadiene and a styrene-butadiene diblock copolymer. Three different block copolymers of about the same overall molecular weight but with differing lengths of the two blocks are utilized. The observed scattering curve is fitted with a calculated one based on a model of polydisperse micelles interacting with each other according to the Percus-Yevick hard-sphere fluid approximation. The following quantities characterizing the structure of the micelle are evaluated as a function of temperature and copolymer concentration: the average radius of the core, the polydispersity of the core radius, the apparent hard-sphere radius of interaction, the critical micelle concentration, the degree of swelling of the core, and the number density of the micelles. The critical micelle concentration decreases as the proportion of styrene in the copolymer increases. The size of the micelles of a given copolymer remains independent of concentration but shows a moderate variation with temperature, especially immediately before the final dissolution temperature.
40 citations
TL;DR: In this paper, a percolation-like model was used to fit dynamical experimental data, and a comparison with the Kerner-Takayanagi model was presented, in which a frequency-composition-temperature correspondence principle was proposed.
Abstract: Rheological properties of styrene-butadiene copolymer-reinforced asphalt were investigated. A percolation-like model was used to fit dynamical experimental data, and a comparison with the Kerner-Takayanagi model is presented. In addition, a frequency-composition-temperature correspondence principle is proposed. This correspondence principle allows the prediction of the rheological behavior of an asphalt-based composite within a wide range of compositions, provided a narrow composition range at different frequencies and temperatures is previously known. © 1996 John Wiley & Sons, Inc.
40 citations
TL;DR: In this paper, the authors examined the effect of normal and frictional forces on the rate and direction of crack growth during the abrasion process and drew a graph of the stored energy release rate versus crack growth rate.
40 citations