On the charge distribution in aqueous poly(styrenesulfonic acid) solutions. A small-angle neutron scattering study

Maarel, Johan R. C. van der; Groot, Leonore C. A.; Hollander, Johan; Jesse, W.; Kuil, Maxim E.; Leyte, J. C.; Leyte-Zuiderweg, L. H.; Mandel, M.; Cotton, J. P.

doi:10.1021/ma00078a027

Cited by 39 publications

(59 citation statements)

References 8 publications

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“…Neutron scattering data (monomer-monomer structure factor) on the 590/43 copolymer sample at the same concentration (salt-free solutions) are reported in Figure 2 and are also well fitted by the form factor of a rod of constant nucleus radial density whose radius is found to be R mn = 0.69 nm (in agreement with previous neutron scattering measurements [7]) and of length 112 nm, in good agreement with the light scattering results. It is meaningful that R mn < R mx since neutron are mostly scat- tered by the carbon and deuterium atoms whereas Xrays mainly probe the SO − 3 group which is located at the outer fringe of the chain.…”

Section: Monomer-monomer Partial Structure Factorsupporting

confidence: 86%

“…Small-angle X-ray scattering [5] (SAXS) and small-angle neutron scattering [6] (SANS) on DNA fragments, which are considered as rigid polyelectrolytes, confirmed the validity of the Poisson-Boltzmann approach for a rod. For more flexible polyelectrolytes like poly(styrene sulfonate) (PSS), experiments also confirm the validity of the Poisson-Boltzmann counterion distribution around a rod but this holds only for a limited scattering wave vector window (between 1 and 3 nm −1 ) where the PSS chains can be considered as rod-like [7].…”

Section: Introductionmentioning

confidence: 99%

“…This effect has received a great deal of attention from the original concept of counterion condensation due to Manning and Oosawa [2] up to more recent and sophisticated analysis [3]. Few experiments have been designed to test explicitly these predictions for the counterion profile [4][5][6][7]. Small-angle X-ray scattering [5] (SAXS) and small-angle neutron scattering [6] (SANS) on DNA fragments, which are considered as rigid polyelectrolytes, confirmed the validity of the Poisson-Boltzmann approach for a rod.…”

Section: Introductionmentioning

confidence: 99%

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Counterion distribution in a spherical charged sparse brush

Muller

Fontaine²,

Delsanti

et al. 2001

The European Physical Journal E

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The counterion distribution within a spherical polyelectrolyte sparse brush was measured by small-angle X-ray scattering using contrast variation with different counterions by means of ion dialysis. The brush was made by self-association of charged diblock copolymers. Thanks to the contrast variation method, we were able to separate the signal due to the monomers and the signal due to the counterions. At a small length scale, it is demonstrated that the system behaves as independent charged rods whose counterion distribution follows the Poisson-Boltzmann model.

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Section: Monomer-monomer Partial Structure Factorsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Counterion distribution in a spherical charged sparse brush

Muller

Fontaine²,

Delsanti

et al. 2001

The European Physical Journal E

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“…[1,2] The study of the interactions involving polyions, counterions, and co-ions has attracted many researchers in the field of polymer science. Experimental and theoretical studies on the structure of polyelectrolyte solutions have been undertaken using a wide range of techniques including light, [3][4][5][6][7] neutron, [8][9][10][11] andX-rayscatterings [12][13][14] aswellasmoremacroscopic techniques such as solution viscosimetry. [15][16][17] Scattering experiments carried out on these systems in absence of added salt (so-called ''salt-free'' solutions) show the existence of a broad scattering peak, which is sometimes called the Coulomb peak, at a certain scattering vector position denoted by q max .…”

Section: Introductionmentioning

confidence: 99%

SAXS from Four‐Arm Polyelectrolyte Stars in Semi‐Dilute Solutions

Moinard

Taton

Gnanou

et al. 2003

Macro Chemistry & Physics

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We have performed small‐angle X‐ray scattering experiments on semi‐dilute solutions of highly charged star polyelectrolytes. Poly(sodium acrylate) (PANa) and poly(cesium acrylate) (PACs) stars with four arms were successfully synthesized by a combination of atom transfer radical polymerization and chemical modifications. Over a wide range of polyelectrolyte concentration Cp, these two systems as well as their equivalent linear polyelectrolytes were investigated at different ionic strengths. Scattering experiments show the existence of a scattering peak denoted as qmax, which disappears with the addition of a simple electrolyte, evidencing the electrostatic character of the interactions. We have also studied the effect of the charge parameter and the nature of the counterion (Na and Cs) on the scattering properties of these star polyelectrolytes. In the case of PACs, qmax scales with the polyelectrolyte concentration as Cp1/2 over the whole range of studied concentrations, whereas it scales as Cp1/2 (for Cp < 45 mg · ml−1) and Cp1/4 (for Cp > 45 mg · ml−1) in the case of PANa. Variation of qmax as a function of polyelectrolyte concentration Cp for PA1Cs (○) and PA2Cs (•) stars (error bars are indicated).magnified imageVariation of qmax as a function of polyelectrolyte concentration Cp for PA1Cs (○) and PA2Cs (•) stars (error bars are indicated).

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“…Si les polyions s'apparentent à des cylindres de quelques Å de diamètre, les contreions condensés forment des tubes qui les enrobent. La fonction de structure partielle S cc met donc en jeu une contribution intra (facteur de [17][18][19].…”

Section: Effet Du Contraste : Fonctions De Structure Partiellesunclassified

Structure des solutions de polyélectrolytes : apport de la diffusion des rayons X et des neutrons aux petits angles

Combet

2010

Journées de la Neutronique

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Résumé. Dans cette contribution, nous présentons l'apport de la diffusion des rayons X et des neutrons à l'étude de la structure des solutions de polyélectrolytes. Le but n'est pas d'être exhaustif sur les dernières avancées réalisées dans ce domaine, mais plutôt de comprendre les principales caractéristiques observées sur les courbes de diffusion ainsi que les renseignements que l'on peut en tirer. Nous verrons que suivant les densités de longueur de diffusion des différents constituants, il est possible d'extraire des informations sur l'état de dispersion ainsi que sur la conformation moyenne des macroions en solution. Nous nous limiterons toutefois à l'étude des systèmes flexibles, hydrophiles, en régime semidilué, sans sel ajouté.

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On the charge distribution in aqueous poly(styrenesulfonic acid) solutions. A small-angle neutron scattering study

Cited by 39 publications

References 8 publications

Counterion distribution in a spherical charged sparse brush

Counterion distribution in a spherical charged sparse brush

SAXS from Four‐Arm Polyelectrolyte Stars in Semi‐Dilute Solutions

Structure des solutions de polyélectrolytes : apport de la diffusion des rayons X et des neutrons aux petits angles

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