Molecular mass characterization of polymers with strongly interacting groups using gel permeation chromatography–light scattering detection

Blagodatskikh, I. V.; Sutkevich, M.V; Sitnikova, N. L.; Churochkina, N. A.; Pryakhina, T. A.; Philippova, Olga E.; Khokhlov, Alexei R.

doi:10.1016/s0021-9673(02)01145-7

Cited by 30 publications

(20 citation statements)

References 22 publications

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“…The incorporation of hydrophobic substitu ents into chitosan is a very promising approach. These substituents form hydrophobic domains [22][23][24][25][26][27] that may absorb drugs poorly soluble in water; as a result, the application areas of chitosan as a drug carrier become wider. Moreover, hydrophobic substituents may enhance transfection [28][29][30]; therefore, the effi ciency of chitosan as gene delivery vehicle may be improved.…”

Section: Introductionmentioning

confidence: 99%

Chitosan and its hydrophobic derivatives: Preparation and aggregation in dilute aqueous solutions

2012

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This review surveys the main methods of preparing chitosan and its hydrophobic derivatives and their influence on the microstructure of polymers. The experimental data on the aggregation of these poly mers in dilute aqueous solutions are summarized. Basic factors affecting aggregation are analyzed, and its general regularities are revealed. It is shown that, in the case of both chitosan and its hydrophobic derivatives, the formation of aggregates is governed by the competition of attraction of associating groups promoting aggregation and their repulsion arising from the presence of charged units and counterions hindering aggre gation. Various aggregate models that were proposed for chitosan derivatives with different main chain lengths and different contents of associating groups are discussed.

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Section: Introductionmentioning

confidence: 99%

Chitosan and its hydrophobic derivatives: Preparation and aggregation in dilute aqueous solutions

2012

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“…It is well known that the molecular weight of hydrophobically modified copolymers is difficult to measure accurately with GPC using water as solvent,29 due to their association. However, GPC can provide some useful information.…”

Section: Resultsmentioning

confidence: 99%

Hydrophobically modified poly(sodium 2‐acrylamido‐2‐methylpropanesulfonate): synthesis and viscosity of aqueous solution

Zhou

Shangguan

et al. 2009

Polymer International

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BACKGROUND: Hydrophobically modified polyelectrolytes are widely used polymers due to their good water solubility, stretched configuration in water and strong hydrophobic association. The study reported here aimed at researching the double action of hydrophobic association and electrostatic effect of novel hydrophobically modified polyelectrolytes in solution. RESULTS: A series of novel hydrophobically modified polyelectrolytes were synthesized by micellar copolymerization with various feed ratios of sodium 2‐acrylamido‐2‐methylpropanesulfonate, N‐n‐dodecylamine and sodium dodecylsulfonate. Their structure was characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance and gel permeation chromatography, and the viscosities of their aqueous and salt solutions were studied. CONCLUSION: The results show that the addition of the hydrophobic comonomer results in a decrease in molecular weight (Mw). The smaller the initial number of hydrophobes in one micelle, the higher is Mw of the resulting copolymer. The viscosity of PAD‐1.73 polyelectrolyte is less sensitive to salt than those of the others. According to the zero shear viscosity and corresponding concentration, the critical cluster‐forming concentration, critical overlap concentration and critical entanglement concentration of these polymer solutions were determined. Moreover, in the dilute regime the viscosity decreases with increasing salinity, while in the semi‐dilute regime the viscosity decreases first and then increases. It is suggested that in dilute and semi‐dilute regimes, hydrophobic intramolecular association and intermolecular association dominate, respectively. Copyright © 2009 Society of Chemical Industry

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“…HM PAAms were synthesized by micellar radical polymerization in water as described in detail in . The molecular mass (MM) of HM PAAm was determined by the gel permeation chromatography as reported elsewhere . The samples of HM PAAm are denoted like 1.0‐C12/10SA, which indicates that the sample contains 1 mol.% of DDAAm units, 10 mol.% of SA units and 89 mol.% of AAm units.…”

Section: Experimental Partmentioning

confidence: 99%

Magnetorheological Fluids Based on Associating Polymers

Barabanova

Молчанов

Philippova

et al. 2014

Macromolecular Symposia

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Molecular mass characterization of polymers with strongly interacting groups using gel permeation chromatography–light scattering detection

Cited by 30 publications

References 22 publications

Chitosan and its hydrophobic derivatives: Preparation and aggregation in dilute aqueous solutions

Chitosan and its hydrophobic derivatives: Preparation and aggregation in dilute aqueous solutions

Hydrophobically modified poly(sodium 2‐acrylamido‐2‐methylpropanesulfonate): synthesis and viscosity of aqueous solution

Magnetorheological Fluids Based on Associating Polymers

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