Styrene butadiene polymer

Acrylics. Acetone is converted via the intermediate acetone cyanohydrin to the monomer methyl methacrylate (MMA) [80-62-6]. The MMA is polymerized to poly(methyl methacrylate) (PMMA) to make the familiar clear acryUc sheet. PMMA is also used in mol ding and extmsion powders. Hydrolysis of acetone cyanohydrin gives methacrylic acid (MAA), a monomer which goes direcdy into acryUc latexes, carboxylated styrene—butadiene polymers, or ethylene—MAA ionomers. As part of the methacrylic stmcture, acetone is found in the following major end use products acryUc sheet mol ding resins, impact modifiers and processing aids, acryUc film, ABS and polyester resin modifiers, surface coatings, acryUc lacquers, emulsion polymers, petroleum chemicals, and various copolymers (see METHACRYLIC ACID AND DERIVATIVES METHACRYLIC POLYMERS). 

Acrylonitrile-styrene-butadiene polymers (ABS) These are complexes of blends and copolymers of excellent toughness. Some recent modifications show a degree of transparency. 

Brandt [200] has extracted tri(nonylphenyl) phosphite (TNPP) from a styrene-butadiene polymer using iso-octane. Brown [211] has reported US extraction of acrylic acid monomer from polyacrylates. Ultrasonication was also shown to be a fast and efficient extraction method for organophosphate ester flame retardants and plasticisers [212]. Greenpeace [213] has recently reported the concentration of phthalate esters in 72 toys (mostly made in China) using shaking and sonication extraction methods. Extraction and analytical procedures were carefully quality controlled. QC procedures and acceptance criteria were based on USEPA method 606 for the analysis of phthalates in water samples [214]. Extraction efficiency was tested by spiking blank matrix and by standard addition to phthalate-containing samples. For removal of fatty acids from the surface of EVA pellets a lmin ultrasonic bath treatment in isopropanol is sufficient [215]. It has been noticed that the experimental ultrasonic extraction conditions are often ill defined and do not allow independent verification. 

Precipitation of the catalyst can be effected by treating the polymer solution with acid/base and/or oxidants. Poloso and Murray [95] proposed a method to recycle the nickel octanoate ((CH3(CH2)6C02)2Ni)/triethylaluminum((C2H5)3Al) catalyst from a styrene-butadiene polymer solution. The polymer solution containing the catalysts was refluxed with 4 wt.% glacial acetic acid (relative to polymer) for 4 h, followed by treatment with 1.4 wt.% anhydrous ammonia. The solution was then filtered through a diatomaceous earth. The nickel content in the polymer was decreased from 310 ppm to 5.6 ppm. 

In the styrene-butadiene polymer example, it is not physically possible to collect spectra of the pure butadiene components (cis-, trans- and 1,2-butadiene) experimentally, because they cannot be synthesized. As a result, only the CLS method that uses estimated pure component spectra basis can be used. Using the concentrations of all four major analytes for all of the calibration samples (obtained by C NMR), it was possible to estimate the pure component spectra of the four known components (see Figure 12.11). When these estimated pure component spectra are then used to estimate the concentrations of the four constituents in the samples (Equation 12.38), it is found that the RMSEE for cA-butadiene is 1.53. 

Figure 12.11 Estimates of the pure component spectra for styrene, i,2-butadiene, ds-butadiene and trans-butadiene units in styrene-butadiene polymers, obtained using the CLS method. The vertical dashed lines indicate the four wavelengths chosen by the stepwise MLR method.

C.E. Miller, B.E. Eichinger, T.W. Gurley and J.G. HermiUer, Determination of microstructure and composition in butadiene and styrene-butadiene polymers by near-infrared spectroscopy. Anal. Chem., 62, 1778-1785 (1990). 

Table 11. Eight-hour time-weighted average exposure levels of butadiene in personal breathing-zone samples at a plant producing styrene-butadiene polymer in the Netherlands, 1990-97...

Matanoski, G.M. Schwartz, L. (1987) Mortality of workers in styrene-butadiene polymer production. J. occup. Med., 29, 675-680... 

Matanoski, G.M., Santos-Burgoa, C. Schwartz, L. (1990a) Mortality of a cohort of workers in the styrene-butadiene polymer manufacturing industry (1943-1982). Environ. Health Perspect.,H6, 107-117... 

Miller, C.E., Eichinger, B.E., Gurley, T.W. and Hermiller, J.G., Determination of Microstructure and Composition in Butadiene and Styrene-Butadiene Polymers by Near-Infrared Spectroscopy Anal. Chem. 1990, 62, 1778-1785. 

Figure 6.8 The effect of pressure on membrane flux for styrene-butadiene polymer latex solutions in a high-turbulence, thin-channel test cell [13]...

The dialkene 1,3-butadiene is widely used in the manufacture of polymers, particularly synthetic rubber. The first synthetic rubber to be manufactured on a large scale and used as a substitute for unavailable natural rubber during World War II was a styrene-butadiene polymer ... 

Figure 3.6 Variation of retention with the composition of the stationary phase in GLC. Stationary phase styrene-butadiene polymer blends and copolymers, the butadiene fraction is plotted on the horizontal axis, (a) Specific retention volumes for three n-alkanes and benzene. V is proportional to the capacity factor, (b) the retention index for benzene. The solid line is calculated from the straight lines in figure 3.6a. The circles (polymer blends) and triangles (copolymers) represent experimental data. Figure taken from ref. [310], Reprinted with permission.

RICON 100 SBS SD 354 S6F HISTYRENE RESIN SKS 85 SOIL STABIUZER 661 SOLPRENE 300 STYRENE-BUTADIENE COPOLYMER STYRENE-1,3-BUTADIENE COPOLYMER STYRENE-BUTADIENE POLYMER SYNPOL 1500 THERMOPLASTIC 125 TR201 UP IE VESTYRON HI... 

STYRENE-BUTADIENE COPOLYMER see SMROOO STYRENE-1,3-BUTADIENE COPOLYMER see SMROOO STYRENE-BUTADIENE POLYMER see SMROOO STYRENE EPOXIDE see EBROOO STYRENE MONOMER (ACGIH) see SMQOOO STYRENE MONOMER, inhibited (DOT) see SMQOOO STYRENE OXIDE see EBROOO STYR NE-7,8-OXIDE see EBROOO STYRENE POLYMER see SMQSOO STYRENE POLYMER with 1,3-BUTADIENE see SMROOO... 

INTEX STABILIZER 17 is an additive to a pad bath designed to give better heat and shear stability to emulsion systems in the presence of inorganic salts. It will stabilize acrylic soil release polymers, acrylic polymers, vinyl acetate polymers, styrene butadiene polymers, urethane emulsions and silicone emulsions. 

Figure 3.45 UF of styrene butadiene polymer latex showing disparity between experimental results and theoretical prediction.

Figure 3.46 Flux vs recirculation rate in linear thin channels (styrene butadiene polymer latex).

Styrene-butadiene polymers have a very low water uptake but tend to undergo chalking and are therefore used for formulating interior-use (latex) paints that can withstand repeated cleaning. 

Chem. Descrip. Bis-(3-[triethoxisily0 propyl)-tetrasulfane CAS 40372-72-3 EINECS/ELINCS 254-896-5 Uses Coupling agent for polysulfide and styrene-butadiene polymers, butyl polymers, for adhesives, coatings, filler treatment, foundry, inks, rubber, sealants, and textile applies. 

Benzene, ethenyl-, polymer with 1,3-butadiene. See Styrene/butadiene polymer... 

Ethenyl acetate. See Vinyl acetate Ethenyl acetate, homopolymer. See Polyvinyl acetate Ethenylhenzene. See Styrene Ethenylbenzene homopolymer. See Polystyrene Ethenylhenzene polymer with 1,3-butadiene. See Styrene/butadiene polymer... 

Slyrene-ethylene/butylene-styrene block copolymer Poly (styrene-co-allyl alcohol). See Styrene/allyl alcohol copolymer Poly (styrene-co-butadiene). See Styrene/butadiene polymer Poly (styrene-co-maleic anhydride). See Styrene/MA copolymer Polystyrene latex Polystyrene resin. See Polystyrene Polystyrene, sulfonated. See Sodium polystyrene sulfonate... 

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