A Comparison of the Effects of Several Solubilized C<sub>6</sub>-Hydrocarbons on theViscosity of a Polysoap Solution

Strauss, Ulrich P.; Layton, Lionel H.

doi:10.1021/j150504a024

Cited by 14 publications

(6 citation statements)

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“…One of the earliest works on the synthesis, characterization, micellization, and solubilization of amphiphilic polymers are papers published by the Strauss group [2,3]. Unlike low-molecular weight surfactants, no critical concentration of a synthesized amphiphilic polymer was necessary for micelle formation [4][5][6]. The authors have concluded that "intramolecular micelles" consisting of one macromolecule have been formed in this case.…”

Section: Introductionmentioning

confidence: 99%

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Kohut¹,

Voronov²,

Voronov³

2013

ChChT

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Using surface tension measurements, solubilization of dimethyl yellow dye and solvatochromic dye E t 30, and fluorescence spectroscopy, amphiphilic polyesters containing alternated hydrophilic poly(ethylene glycol) fragments and lipophilic dicarboxylic acid or polytetrahydrоfuran moieties in the polymer backbone have been shown to form monomolecular micelles in aqueous solutions at the concentrations of 10 -7 -10 -4 %. These monomolecular micelles have been demonstrated to possess invertibility and respond to the change in a medium polarity.

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Section: Introductionmentioning

confidence: 99%

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Kohut¹,

Voronov²,

Voronov³

2013

ChChT

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“…Since the amino groups are much more accessible, PDMAEMA has a higher quaternization efficiency than P2VP. [18][19][20][21] DMAEMA is easier to handle than the corresponding acrylate (DMAEA), especially under ATRP conditions. This is reflected, e.g., by the fact that only one publication is available for ATRP of the latter monomer 22 while there are many for DMAEMA.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Star-Shaped Poly(N,N-dimethylaminoethyl methacrylate) and Its Quaternized Ammonium Salts

et al. 2007

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We report on the synthesis and characterization of star-shaped strong polyelectrolytes and their precursor stars with up to 24 arms. To achieve this we polymerized 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA) by atom transfer radical polymerization employing a core-first attempt. Sugar-based scaffolds as well as silsesquioxane nanoparticles were used as oligofunctional initiators. Subsequent quaternization of the obtained poly(DMAEMA) stars yielded star-shaped poly{[2-(methacryloyloxy)ethyl] trimethylammonium iodide} (PMETAI). The initiation site efficiency was determined both by molecular weight measurements of the cleaved arms and by a statistical method after partial destruction of the inorganic core. The rather low efficiency of the initiation sites (30−75%) leads to a moderate arm number distribution of the prepared polyelectrolyte stars. As expected, the hydrodynamic radii of these polyelectrolyte stars decrease with increasing ionic strength. However, if the ionic strength was adjusted with NaI instead of NaCl, pronounced ion-specific effects were observed; the star polyelectrolyte first strongly shrinks with increasing salt concentration and becomes insoluble at about 0.5 M NaI (“salting out”). Still higher concentrations of NaI lead to a redissolution and a reswelling of the star polyelectrolyte (“salting in”). The measured osmotic coefficients are low and decrease with increasing arm number from φ ∼ 0.12 for a 3-arm star down to φ ∼ 0.04 for an 18-arm star, confirming the expected strong counterion confinement within these objects with high charge density.

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“…Hydrophilic polymers incorporating, at intervals, amphiphilic monomers form intrachain micelles in aqueous media. , The interior of such micelles is similar to that of micelles formed by short-chain amphiphiles. They comprise hydrophobic cores of hydrocarbon tails with polar or ionic head groups straddling the interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…These issues are of interest from two perspectives. First, polysoaps and the related hydrophobically modified water-soluble polymers are of practical importance as viscosity modifiers. , These associating polymers are used in the cosmetics, paints, and paper industries in order to adjust the flow properties of fine solid dispersions. Their utility is due to their shear thinning behavior, which is attributed to the formation of weak physical gels.…”

Section: Introductionmentioning

confidence: 99%

Micelles of Polysoaps: The Role of Bridging Interactions

Borisov

Halperin²

1996

Macromolecules

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Polysoaps, hydrophilic polymers incorporating amphiphilic monomers, form intrachain micelles in aqueous media. The micelles are similar to those formed by monomeric amphiphiles but are also endowed with a swollen, starlike corona formed by the spacer chains joining the amphiphiles. Long polysoaps form strings comprising many intrachain micelles. Exchange of amphiphiles between such micelles may give rise to bridging attraction, resulting in the adoption of a collapsed configuration in which the swollen micelles are close packed into a spherical globule. Upon addition of free amphiphiles, this structure unravels in a highly nonlinear fashion. Titration by surfactants, and the resulting swelling, provide information about the configurations of the dilute polysoaps.

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A Comparison of the Effects of Several Solubilized C₆-Hydrocarbons on theViscosity of a Polysoap Solution

Cited by 14 publications

References 0 publications

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Synthesis and Characterization of Star-Shaped Poly(N,N-dimethylaminoethyl methacrylate) and Its Quaternized Ammonium Salts

Micelles of Polysoaps: The Role of Bridging Interactions

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A Comparison of the Effects of Several Solubilized C6-Hydrocarbons on theViscosity of a Polysoap Solution

Cited by 14 publications

References 0 publications

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Monomolecular Micelles Based on Amphiphilic Invertible Polymers

Synthesis and Characterization of Star-Shaped Poly(N,N-dimethylaminoethyl methacrylate) and Its Quaternized Ammonium Salts

Micelles of Polysoaps: The Role of Bridging Interactions

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Product

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A Comparison of the Effects of Several Solubilized C₆-Hydrocarbons on theViscosity of a Polysoap Solution