New approach to the molecular characterization of hydrophobically modified polyacrylamide

Blagodatskikh, I. V.; Васильева, О. В.; Иванова, Е. А.; Bykov, Sergei V.; Churochkina, N. A.; Pryakhina, T. A.; Смирнов, В. А.; Philippova, Olga E.; Khokhlov, Alexei R.

doi:10.1016/j.polymer.2004.06.040

Cited by 44 publications

(34 citation statements)

References 14 publications

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“…Feed sample solutions were prepared by dissolving a known amount of polymer in water and adding the required amounts of Cu 21 or m-cresol. The dialysis cell was initially filled with 6 mL of feed solution.…”

Section: Synthesis Of Amphiphilic Copolymersmentioning

confidence: 99%

“…The equilibration period was 24 h, determined in dialysis experiments in the absence of polymer. The concentration of Cu 21 or m-cresol of the permeate samples at the desired time intervals were analyzed spectroscopically using a UV-vis spectrophotometer (Lamda 35, Perkin-Elmer) at a wavelength of 800 nm for Cu 21 and 285 nm for mcresol. To investigate the effect of sodium chloride, some experiments were performed with the same concentrations of sodium chloride added to the retentate and the permeate solutions.…”

Section: Synthesis Of Amphiphilic Copolymersmentioning

confidence: 99%

“…However, the use of acetonitrile as cosolvent probably improves the solubility of these AMPS co copolymers, allowing the GPC analysis. The low ability of acetonitrile to form H-bonds leads to a partial disruption of the water structure 21 and weakens the hydrophobic aggregation existed in solutions in the course of the chromatography. Moreover, the presence of salt allows the screening of the charges of polyelectrolyte to minimize ionic interactions and allows coil formation in the polymer chain.…”

Section: Synthesis Of the Copolymers Of Amps And Idmamentioning

confidence: 99%

“…To study the composition-dependent sequestration of Cu 21 or m-cresol by AMPS co copolymers, equilibrium dialysis experiments were performed at 258C. The experiments were carried out using surfactant concentrations 0.3 g/L higher than CAC, i.e., 1.5 g/L for AMPS co (11) and 0.6 g/L for AMPS co (20) and (30), in the absence and in the presence of NaCl 1M.…”

Section: Binding Of Organic Compounds and Metal Ionsmentioning

confidence: 99%

“…It appears that Cu 21 in the solution promotes a change in the domain organization (aggregation number or polymer conformation), such that significantly higher loadings of Cu 21 can be accommodated. This change is less pronounced and occurs at higher Cu 21 concentration for AMPS co (11) compared with AMPS co (30), indicating the role of the hydrophobic modification level in aggregation and thus metal ion sequestering. This feature is also confirmed by the higher m-cresol molar binding by increasing the hydrophobic level in the copolymers, which points out that the interaction of polymer with m-cresol is favored with a higher content of iDMA.…”

Section: Binding Of Organic Compounds and Metal Ionsmentioning

confidence: 99%

See 4 more Smart Citations

Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Peinado

Catalina

Miguel

2007

J of Applied Polymer Sci

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: Synthesis and association properties in water solution of random copolymers of 2-acrylamido-2-methyl-1-propane sulfonic acid and isodecyl methacrylate-potential application as surfactants in micellar-enhanced ultrafiltration processes. Fluorescence spectroscopy was used to further confirm the copolymers self-aggregate in water. Critical concentration of the self-aggregate formation (CAC) decreased by increasing the molar fraction of iDMA in the AMPS co copolymers and varied between 1.20 and 0.04 g/L depending on the degree of hydrophobic modification. Hence, copolymer composition and charge density allowed tuning the pseudomicellar characteristics of these new amphiphilic copolymers. The addition of a salt or a low-molecular-weight surfactant was studied. Binding of CTAB to the AMPS co copolymers leads to a high decrease of CAC, i.e., 0.006 g/L. Effect of the composition in the viscosimetric behavior of the hydrophobically modified copolymers AMPS co was investigated. The removal of single metal ions, Cu 21 , and m-cresol from aqueous solutions by ultrafiltration with the help of the copolymers was investigated. Equilibrium dialysis experiments demonstrate that the formation of hydrophobic microdomains can be used to control the sequestration of foulants, and thus these novel copolymers have potential application as polymeric surfactants in micellar-enhanced ultrafiltration processes for water purification. Journal of Applied Polymer

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Section: Synthesis Of Amphiphilic Copolymersmentioning

confidence: 99%

Section: Synthesis Of Amphiphilic Copolymersmentioning

confidence: 99%

Section: Synthesis Of the Copolymers Of Amps And Idmamentioning

confidence: 99%

Section: Binding Of Organic Compounds and Metal Ionsmentioning

confidence: 99%

Section: Binding Of Organic Compounds and Metal Ionsmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Peinado

Catalina

Miguel

2007

J of Applied Polymer Sci

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Synthesis and characterizations of hydrophobically associating water‐soluble polymer with nonionic surfmer

Jiang

Zhang

et al. 2015

J of Applied Polymer Sci

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In this article, a hydrophobically associating copolymer (2‐acrylamido)‐2‐methylpropanesulfonic acid (AMPS)/AA‐EO25C12 was synthesized by AMPS and nonionic surfmer AA‐EO25C12 through free radical copolymerization. The structure of copolymer was characterized by FT‐IR and 1H‐NMR. The properties of copolymer were studied and the results indicated that the copolymer exhibits good thickening ability due to intermolecular hydrophobic associations as the apparent viscosity of the copolymer solution increases sharply with increasing polymer concentration. Compared with homopolymer PAMPS, the rheological test indicates that the copolymer solution shows shear thickening behavior at low shear rate region. Besides, the copolymer exhibits interfacial activity as it can reduce the interfacial tension to 10° level, and ability to form emulsion with good stability, which is due to successfully introducing the structure of nonionic surfmer AA‐EO25C12 to the polymer chain. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43195.

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Tissue‐based risk assessment of cyclic volatile methyl siloxanes

Redman¹,

Mihaich²,

Woodburn³

et al. 2012

Enviro Toxic and Chemistry

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Cyclic volatile methyl siloxanes (cVMS) are important consumer materials that are used in personal care products and industrial applications. These compounds have gained increased attention in recent years following the implementation of chemical legislation programs worldwide. Industry-wide research programs are being conducted to characterize the persistence, bioaccumulation, and toxicity (PBT) properties of cVMS materials. As part of this larger effort, a tissue-based risk assessment was performed to further inform the regulatory decision-making process. Measured tissue concentrations of cVMS compounds in fish and benthic invertebrates are compared with critical target lipid body burdens (CTLBBs) as estimated with the target lipid model (TLM) to evaluate risk. Acute and chronic toxicity data for cVMS compounds are compared with data for nonpolar organic chemicals to validate application of the TLM in this effort. The analysis was extended to estimate the contribution from metabolites to the overall cVMS-derived tissue residues using a food chain model calibrated to laboratory and field data. Concentrations of cVMS materials in biota from several trophic levels (e.g., invertebrates, fish) are well below the estimated CTLBBs associated with acute and chronic effects. This analysis, when combined with the limited biomagnification potential for cVMS compounds that was observed in the field, suggests that there is little risk of adverse effects from cVMS materials under present-day emission levels.

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New approach to the molecular characterization of hydrophobically modified polyacrylamide

Cited by 44 publications

References 14 publications

Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Synthesis and association properties in water solution of random copolymers of 2‐acrylamido‐2‐methyl‐1‐propane sulfonic acid and isodecyl methacrylate—potential application as surfactants in micellar‐enhanced ultrafiltration processes

Synthesis and characterizations of hydrophobically associating water‐soluble polymer with nonionic surfmer

Tissue‐based risk assessment of cyclic volatile methyl siloxanes

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