Sulfonated styrene divinylbenzene

Unlike earlier sulfonated styrene/divinylbenzene copolymers, these sulfonated gels can he run in virtually any solvent from water and buffers to pure organics as well as most any mixed solvent systems desired. In aqueous systems they absorb water and in organic solvents they stay swollen by imbibing organic solvents. 

Sulfonated styrene divinylbenzene. d Polysulfonated styrene divinylbenzene. e Polysulfonated 4-clorostyrene divinylbenzene. 

See also Macroreticular sulfonated styrene-divinylbenzene copolymers... 

Each teaspoonful (5 mL) of TUSSIONEX Pennkinetic extended-release suspension contains hydrocodone polistirex equivalent to 10 mg of hydrocodone bitartrate and chlorpheniramine polistirex equivalent to 8 mg of chlorpheniramine maleate. TUSSIONEX Pennkinetic extended-release suspension provides up to 12-hour relief per dose. Hydrocodone is a centrally acting narcotic antitussive. Chlorpheniramine is an antihistamine. TUSSIONEX Pennkinetic extended-release suspension is for oral use only. Hydrocodone polistirex sulfonated styrene-divinylbenzene copolymer complex with... 

Ion exchange Celltech Sulfonated styrene -divinylbenzene copolymer Controlled Release Delsym... 

Castane (31) suggests a method that is an alternative both to the enzymatic one and to gas chromatography. He uses a column, sulfonated styrene divinylbenzene resin in H+ form (Fast-Fruit Juice), 7 fim, 7.8 X 150 mm and a refractive index detector. The mobile phase, composed of H2S04 0.002 M, is maintained at 60°C. In this way he succeeds in separating and quantifying the ethanol in concentrations between 0 and 1% (v/v). The author also ascertains a reproducibility of 0.04% v/v and a repeatability of 0.07% v/v with a precision value of 0.55% v/v. 

Corrected Intensities and Composition Calculated for Sulfonated Styrene Divinylbenzene Crosslinked Beads... 

Solid acids are widely used to catalyze electrophilic reactions. Sulfonated styrene-divinylbenzene cross-linked polymers are efficient solid acids. These resins, such as Dowex 50, Amberlite IR-112 and... 

Fig. 3-129. Separation of alkali metals at a surface-sulfonated styrene/divinylbenzene copolymer. — Separator column IonPac CS2 eluent 0.03 mol/L HC1 flow rate 1 mL/min detection suppressed conductivity injection volume 50 pL solute concentrations 5 ppm lithium and sodium, 10 ppm ammonium and potassium, 20 ppm rubidium, and 30 ppm cesium.

Carta and Dinerman [22] have observed the adsorption azeotrope experimentally for the separation of a-aminobutyric acid and isoleucine on Dowex 50W-X8 resin, a sulfonated styrene-divinylbenzene copolymer which is moderately cross-linked. Figure 12.13a shows the experimental and calculated band profiles for the case of a separation azeotrope with a 125 mM NaOH solution as the displacer. Further increase in the column length results in the same normalized profile, which means that steady state has been reached with incomplete separation. Figure 12.13b illustrates the separation with a 25 mM NaOH solution as the displacer. Complete separation occurs. 

Ion Exchange Resins As Chromatographic Supports. A versatile type of support is one which can exhibit differential ion exclusion, size exclusion, ion complexing, and hydrophobic interaction characteristics with respect to a variety of molecules. In fact, a generic support of this type exists, and is based on a copolymer of sulfonated styrene-divinylbenzene (DVB). Sulfona-tion impacts the ability of the support to complex counter-ions which, in turn, can complex with the solute or exclude an ionic species. The degree of resin cross-linking is proportional to DVB content and determines effective porosity of the resin and size exclusion characteristics. 

Figure 3.2 Example preparation method and chemical structure of a cation exchange membrane with sulfonated styrene-divinylbenzene copolymer.

Figure 4.8 Current efficiency versus fixed ion concentration of a cation exchange membrane in the electrolysis of a sodium chloride solution. Cation exchange membrane sulfonated styrene—divinylbenzene type. Anolyte saturated NaCl catholyte 3.0 N NaOH current density 10Adm 2 at 70 °C.

Ohta, K. and Ohashi, M., Separation of C1-C5 aliphatic carboxylic acids on a highly sulfonated styrene-divinylbenzene copolymer resin column with a C6 aliphatic carboxylic acid solution as the mobile phase. Anal. Chim. Acta, 481, 15-21, 2003. 

Ohta, K., Towata, A., and Ohashi, M., Ion-exclusion chromatographic separations of Cj-Cg aliphatic carboxylic acids on a sulfonated styrene-divinylbenzene co-polymer resin column with... 

A typical cation-exchange resin of the sulfonated styrene-divinylbenzene (DVB) type, such as Dowex 50, has an exchangeable ion capacity of 5.0 meq/g of dry resin. As shipped, the water-wet resin might contain 41.4 wt% water. Thus, the wet capacity is 2.9 meq/g of wet resin. If the bulk density of a drained bed of wet resin is 0.83 g/cm3, the bed capacity is 2.4 eq/L of resin bed (Seader and Henley, 2006). 

F 8.10 SEC analysis of com syrup on a sulfonated styrene-divinylbenzene resin in the Ca form. Peak identification (1) high-MW oligomers (2) DP-4 (3) nudtotriose (4) maltose (5) glucose. (Chromatographic conditions Column Sugar-Pak 1,6.5 mm x 300 mm. Mobile phase water. Flow rate ImL/min.) (Chromatogram courtesy of Waters Corp.)... 

There is one spedal application of size-exclusion chromatography that is different from the techniques discussed so far it is the SEC of oligosacdiarides, whidi is carried out on sulfonated styrene-divinylbenzene packings in various ionic forms, most frequently the Ca fornL The moUle phase is water at elevated temperature. An example of this is the determination of the oligomeric compoation of com syrup shown in Figure 8.10. 

Methyl salicylate has been alkylated with isobutylene and isoamylene on Indion 130, a macroporous sulfonated styrene-divinylbenzene resin with cross-... 

The activation energy E is estimated at 21 3 kj/mol for sulfonated styrene-divinylbenzene cation-permeable membranes in equihbrium with one of the following solution 0.1-1 N NaCl 0.001-1 N Mgaz 0.01-0.5 N CdClz and 0.1-2.5 N FeCls. The energy E would increase if weakly ionized groups were present in the membrane. 

Suitable catalysts for the butylation of phenol with isobutene to p-tert-butylphe-nol are sulfuric acid, phosphoric add, boron trifluoride or macroporous, pelleted, strongly acidic sulfonated styrene/divinylbenzene resins. 

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