Styrene butadiene rubber-sodium

Alkyl alkoxy silanes have been found to be very effective in reducing alkali-aggregate expansion [11] (Fig. 6.4). Of the silanes used in the study, hexyl trimethyl siloxane and decyl trimethoxyl silane were found to be more effective in decreasing the expansion than the others. In the same study, Ohama et al. [11] investigated the effect of sodium silicofluoride, alkyl alkoxy silane, lithium carbonate, lithium fluoride, styrene-butadiene rubber latex and lithium hydroxide on compressive strength and the expansion of mortar containing cement with 2% equivalent Na20. The reduction of the level of expansion shown in Fig. 6.4 with the siloxanes was attributed to... 

The paper industry uses large amounts of the sodium salt of rosin as paper size, which accounts for the greatest single use of rosin. The synthetic rubber industry is the second most important user of rosin. In making styrene-butadiene rubber, disproportionated rosin soaps are used alone or in combination with fatty acid soaps as emulsifiers in the polymerization process. Disproportionation decreases the number of double bonds in the abietic acid of the rosin, making a more stable material. 

P(S VPD) P(S-b-BR) PSA PSBMA poly(styrene-co-4-vinylpyridine) styrene-butadiene rubber block copolymer poly(sodium acrylate) poly(sec-butyl methacrylate)... 

By 1929 the German firm I. G. Earben developed a series of synthetic rubbers similar to those produced in the USSR. They were called Buna rubbers ( Bu for butadiene, one of the copolymers, and na for sodium, the polymerization catalyst). They included the oil-resistant Buna S (S for styrene) and Buna N (N for nitrate). Buna S, styrene butadiene rubber, is currently called SBR, and it is produced at about twice the volume of natural rubber, making it the most common synthetic rubber. Buna N, acrylonitrile-butadiene rubber, is now called NBR. During World War II the United States produced these rubbers for the American war effort. 

Materials. Styrene-Butadiene Rubber (SBR) Latex. SBR latex was prepared by redox emulsion polymerization using (in parts) butadiene (69) and styrene (31) at 6°-40°C (pinane hydroperoxide/sodium formaldehyde sulfoxylate/Fe++ as initiator) in the presence of potassium oleate (2.7) inorganic electrolytes (0.45) as polymerization aids, and demineralized water (135) until a conversion of 70% was achieved. Residual monomers were then removed. 

Sodium acrylate Styrene-butadiene rubber Scanning electron microscopy... 

Buqa H, Holzapfel M, Krumeich F, Veit C, Novak P (2006) Study of styrene butadiene rubber and sodium methyl cellulose as binder for negative electrodes in lithium-ion batteries. J Power Sources 161 617-622... 

BHT, butylated hydroxytoluene DBS, sodium dodecylbenzene sulfonate DSTDP, distearylthiodipropionate PAAE, polyamide amine epichlorohydrin PAM, polyacryl(methacrylate) PEG, polyoxyethylene lauryl ether SBR, styrene-butadiene rubber. 

METHOD 54 - DETERMINATION OF STEARIC ACID AND SODIUM STEARATE IN STYRENE-BUTADIENE RUBBER SOLUTIONS. TITRIMETRIC PROCEDURE. 

This titrimetric procedure is capable of determining down to 0.01% of stearic acid and sodium stearate in styrene-butadiene rubber solutions. 

The Government Rubber Reserve Company in the 1940s pioneered the development of styrene-butadiene copolymers, by far the largest volume of synthetic rubber used today. Now usually known as SBR, it has also been called Buna-S, Rzrtadiene with a sodium (Na) catalyst and copolymerized... 

Stephens et al.70-72 examined the commercial potential of SX-reinforced rubber. SX reinforced styrene-butadiene and nitrile-butadiene rubber compounds, but displayed no reinforcement of natural rubber. The addition of resorcinol-formaldehyde resin at 8% of the starch weight significantly improved the mechanical properties for all three rubber compounds. The preparation of starch xanthide-rubber compounds by crosslinking the SX with sodium nitrite produced results similar to those obtained by adding resorcinol-formaldehyde resin. 

Structure and Composition of Diene Copolymers. One finds that most of the reported copolymerization studies on butadiene or isoprene involve styrene as comonomer. In part this is due to the early interest in styrene-butadiene synthetic rubbers. The free radical produced copolymers (GRS, usually about 20—25% styrene units) contain about 20% of its butadiene fraction in the 1,2 form. The ratio of 1,2 to 1,4 units is little affected by polymerization variables such as temperature, conversion and styrene content (39). Butadiene and styrene copolymers contain 50 to 60% 1,2-diene units when prepared by sodium catalysts at 50° (39). This behaviour is once more significantly different when lithium is used in place of sodium as can be seen in Table 3. 

Chem. Descrip. Sodium lauryl sulfate CAS 151-21-3 EINECS/ELINCS 205-788-1 Uses Surfactant, detergent for use in shampoos, bubble baths, liq. hand dish detergents, and mild industrial cleaners surfactant in emulsion polymerization, esp. for styrene, butadiene, vinyl chloride, vinylidene chloride, and acrylic ester monomers food pkg. adhesives, paper, cellophane, rubber articles, textiles defoamer in food-contact paper/paper-board emulsifier in mfg. of food-contact articles resinous/polymeric food-contact coatings Features High foam... 

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