Sodium dodecyl poly

The kinetics of vinyl acetate emulsion polymeriza tion in the presence of alkyl phenyl ethoxylate surfactants of various chain lengths indicate that part of the emulsion polymerization occurs in the aqueous phase and part in the particles (115). A study of the emulsion polymerization of vinyl acetate in the presence of sodium lauryl sulfate reveals that a water-soluble poly(vinyl acetate)—sodium dodecyl sulfate polyelectrolyte complex forms, and that latex stabihty, polymer hydrolysis, and molecular weight are controlled by this phenomenon (116). 

Benedek, K. and Thiede, S., High performance capillary electrophoresis of proteins using sodium dodecyl sulfate-poly(ethylene oxide), J. Chromatogr., 676, 209, 1994. 

Burnette WN. 1981. Western blotting electrophoretic transfer of proteins from sodium dodecyl sulfate-poly-acrylamide gels to unmodified nitrocellulose and radio-graphic detection with antibody and radioiodinated protein A. Anal Biochem 112 195-203. 

J. Lucassen, F. Hollway, and J.H. Buckingham Surface Properties of Mixed Solutions of Poly-Lysine and Sodium Dodecyl Sulfate. 2. Dynamic Surface Properties. J. Colloid Interface Sci. 67, 432 (1978). 

E. Staples, I. Tucker, J. Penfold, R.K. Thomas, and D.J.F. Taylor Organization of Polymer-Surfactant Mixtures at the Air-Water Interface Sodium Dodecyl Sulfate and Poly Dimethyldiallylammonium Chloride. Langmuir 18, 5147 (2002). 

Micellar media created by sodium dodecyl sulfate or cetyltrimethylammon-ium bromide have also a positive effect on the ortho selectivity [262,269-271]. In a recent article, the PFR of 1-naphthyl acetate in aqueous solutions of an antenna polyelectrolyte like poly(sodium styrenesulfonate-co-2-vinylfluorene) has been reported, which, in addition to the micellar effect, also provides singlet sensitization by means of fluorene chromophores. In this particular case, the occurrence of in-cage versus out-of-cage processes can be clearly correlated with the different packing of the microdomains, which depends on the molar fraction of monomers in the antenna copolymer [272]. 

In this paper, we report the solution properties of sodium dodecyl sulfate (SDS)-alkyl poly(oxyethylene) ether (CjjPOEjj) mixed systems with addition of azo oil dyes (4-NH2, 4-OH). The 4-NH2 dye interacts with anionic surfactants such as SDS (11,12), while 4-OH dye Interacts with nonionic surfactants such as C jPOEn (13). However, 4-NH2 is dependent on the molecular characteristics of the nonionic surfactant in the anlonlc-nonlonic mixed surfactant systems, while in the case of 4-OH, the fading phenomena of the dye is observed in the solubilized solution. This fading rate is dependent on the molecular characteristics of nonionic surfactant as well as mixed micelle formation. We discuss the differences in solution properles of azo oil dyes in the different mixed surfactant systems. 

Anionic surfactant Sodium dodecyl sulfate (SDS, C] 2 25 3 supplied by Nihon Surfactant Industries Co., Ltd Tokyo, Japan. It was extracted with ether and recrystallized from ethanol. The purity was ascertained by surface tension measurement. Nonionic surfactant Alkyl poly(oxyethylene) ether (CjjPOEjj, CmH2nhPlO(CH2CH20)2oH, m=12, 14, 16, and 18 Ci6H330(CH2CH20) H, n=10, 20, 30, and 40) were supplied by Nihon Surfactant Industries Co., Ltd. These have a narrow molecular weight distribution. 

AA BAA CMC CPB CTAB DM SO IPC MVPQ PAA PDADMAB PEG PIPAA SDS SMA TEMED acrylamide methylene bisacrylamide critical micelle concentration cetylpyridinium bromide cetyltrimethylammonium bromide dimethylsulfoxide interpolymer complex methylvinylpiridine units quaternized by dimethyl sulfate poly(acrylamide) poly(diallyldimethylammonium bromide) polyethylene glycol) poly(isopropylacrylamide) sodium dodecyl sulfate sodium methacrylate tetramethylethylenediamine... 

A detailed study of the structure of the aggregates of the ionic surfactants in polyelectrolyte networks was presented in Refs. [66,68]. The dynamics of the changes in the microenvironment of the fluorescent probe, pyrene, in slightly crosslinked networks of poly(diallyldimethylammonium bromide) (PDADMAB) during diffusion of sodium dodecyl sulfate (SDS) in the gel phase has been investigated by means of fluorescence spectroscopy. In Ref. [66], an analogous investigation was reported for complexes formal by the sodium salt of PMAA with cetyltrimethylammonium bromide (CTAB). 

Almgren. M., J. Van Stam, C. Lindblad, P. Stilbs, and P. Bahadur. 1991. Aggregation of polyethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymers in the presence of sodium dodecyl sulfate in aqueous solutiod.. Phys. Chem. 95 5677-5684. 

Polypeptides adopting a 3-structure exhibit CD spectra, the characteristic features of which are a negative band at about 216 nm ([ ] = -18,000) and a positive band of comparable magnitude near 195 nm (Figure 2). However, the CD spectra of (3-struc-tures show much more pronounced variations with solvent and amino acid residues than those of the a-helix, both in amplitude and in the position of the bands. In the presence of sodium dodecyl sulfate, the (3-form of poly(L-lysine), though still a 13-structure by infrared criteria, gives a 218 nm CD band only about half as large as that in the absence of the surfactant.[11]... 

A sample of poly(L-ornithine) containing 48 mol% azo units was found to adopt the a-helix structure in HFP/water = 1/1. In this solvent mixture, however, irradiation at 360 nm followed by irradiation at 460 nm produced the trans-cis photoisomerization of the azo moieties, but did not induce any change of the backbone conformation. When the surfactant sodium dodecyl sulfate was added to the HFP/water solvent mixture, the CD spectrum displayed an intense side chain CD couplet and a negative band at about 225 nm which was assigned to the presence of a P-structure. The CD bands were almost completely abolished upon trans-cis photoisomerization. 

Fig. 10 Temperature dependencies of poly(N-vinylcaprolactam) (PVCL) hydrodynamic diameter as a function of surfactant concentration 1 0, 2 0.25, 3 0.5, 4 1, 5 3 mmol/L sodium dodecyl sulfate. (Reprinted with permission from Ref. [37]. Copyright 1998 American Chemical Society)...

The phase separation behavior of a sample of poly(N-vinyl-2.pyrrolidone) (PVP) in aqueous Na2S04 (0.55 M) containing a surfactant, sodium dodecyl sulfate (SDS), was reported [83], This phenomenon was studied in function of temperature and surfactant concentration as independent variables. Without surfactant, the polymer exhibits a lower solution temperature (LCST) of 28°C, above which it precipitates. At SDS concentrations of only 300 mg L-1, aggregation was prevented and the behavior of isolated polymer molecules could be studied. 

M. A. Cevalloa, C, Navarro-Duque, M. Vaiela-JuKa, and A. C. Alagon. Molecular mass determination and assay of venom byaluronidases by sodium dodecyl sulfate-poly sciylaraide gel electrophoresis. Tcvcwm 50 925 (1992). 

PL PVC Q RPC S SM SP SDS SDS-PAGE TEAE TAM Ve V0 vs Vt X y reversible complex ptotein-ligand poly vinyl chloride quaternary amine reverse phase chromatography Sulfonate Sulfomethyl Sulfopropyl sodium dodecyl sulphate sodium dodecyl sulphate - polyacrylamide gel electrophoresis Triethylaminoethyl Trimethylaminomethyl elution volume interstitial volume of the porous matrix total solvent volume within the pores total column volume solute concentration in the original solution solute concentration in the extract... 

SLES =Sodium lauryl ether sulfate, SDS = Sodium dodecyl sulfate, APG = Alkyl poly glucoside, CAPB = Coco amido propyl betaine,... 

APG = Alkyl poly glucoside, SCI = Sodium cocoyl isethionate, CAPB=Coco amido propyl betaine, SLES = Sodium lauryl ether sulfate, MAP=Mono alkyl phosphate, SDS=Sodium dodecyl sulfate... 

Figure 2. Far UV CD spectra of homopolymers which adopt a p-sheet conformation poly(Lys), pH 11.1 after heating, — poly(Lys), in 1% sodium dodecyl sulfate, — poly(Lys-Leu) in 0.1 M NaF, pH 7, . (From ref. 14)...

Abstract Investigations of alternate adsorption regularities of cationic polyelectrolytes a) copolymer of styrene and dimethylaminopropyl-maleimide (CSDAPM) and b) poly(diallyldimethylammonium chloride) (PDADMAC) and anionic surfactant - sodium dodecyl sulfate (SDS) on fused quartz surface were carried out by capillary electrokinetic method. The adsorption/desorption kinetics, structure and properties of adsorbed layers for both polyelectrolytes and also for the second adsorbed layer were studied in dependence on different conditions molecular weight of polyelectrolyte, surfactant and polyelectrolyte concentration, the solution flow rate through the capillary during the adsorption, adsorbed layer formation... 

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