Conformation of sodium poly(4-styrenesulfonate) macromolecules in aqueous solutions

Zaitseva, I. I.; Gubarev, A. S.; Корнеева, Е. В.; Гаврилова, И. И.; Panarin, E. F.

doi:10.1134/s0012500808040083

Cited by 10 publications

(7 citation statements)

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“…8) which shows that in salt free solvent NaPSS molecules belong to extra-rigid zone, at 0.005 M solvent NaPSS molecules be found in rigid macromolecules zone, at 1 M belong to the zone of flexible macromolecules, and at 4.17 M macromolecules of NaPSS be found between the zone of flexible macromolecules in y conditions and the zone of globular conformation. These conclusions are supported by estimation of the statistical segment lengths (Hirose et al 1999;Pavlov et al 2008).…”

Section: Examples Of Normalized Hydrodynamic Plots In Interpreting Hy...mentioning

confidence: 60%

“…Quantitative evaluation of the statistical segment length A (also known as the "Kuhn segment length") can be estimated by Gray-Bloomfield-Hearst theory which considers the dependence of the translational friction coefficient of a wormlike chain on molar mass taking into account the influence of A !15 nm), III-IV -flexible chain in thermodynamically good solvents and in y conditions (A % 2 nm), and V-globular system (A < 1 nm). The references to the original publication concerning the compared polymer systems may be found in the following publications: Pavlov et al 1997Pavlov et al , 2008…”

Section: Second Normalization Of the Mhks Relationships For Statistic...mentioning

confidence: 99%

“…Applicability of normalized hydrodynamic plots can be illustrated with the data obtained for the sodium poly(4-styrenesulfonate) (NaPSS) in aqueous solutions as studied by Takahashi et al (1967), Hirose et al (1999), andPavlov et al (2008) at various ionic forces and in a wide interval of molar mass. In salt-free solutions, NaPSS shows polyelectrolyte behavior, at addition NaCl polyelectrolyte effects suppress to be The intrinsic viscosity in salt-free solutions is defined as the initial slope of the following dependences: lnZ r versus f(c) at c!0, where Z r is the relative viscosity of a solution at concentration c (Pavlov et al 2006).…”

Section: Examples Of Normalized Hydrodynamic Plots In Interpreting Hy...mentioning

confidence: 99%

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Karaca

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Encyclopedia of Biophysics

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Section: Examples Of Normalized Hydrodynamic Plots In Interpreting Hy...mentioning

confidence: 60%

Section: Second Normalization Of the Mhks Relationships For Statistic...mentioning

confidence: 99%

Section: Examples Of Normalized Hydrodynamic Plots In Interpreting Hy...mentioning

confidence: 99%

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Karaca

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Encyclopedia of Biophysics

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“…The noncharged analogue of the MVAA–MVAHCl copolymer is water-soluble poly( N -methyl- N -vinylacetamide) (PMVAA), while hydrophobic polystyrene is the noncharged analogue of PSSNa. The part of the previous experimental results was published earlier. − …”

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confidence: 99%

Strong Linear Polyelectrolytes in Solutions of Extreme Concentrations of One–One Valent Salt. Hydrodynamic Study

et al. 2014

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Two series of highly charged linear aliphatic polymerssodium polystyrene-4-sulfonate and random copolymer of N-methyl-N-vinylacetamide and N-methyl-N-vinylamine hydrochloridewere studied in water solution without added salts and in solutions containing up to 5 M NaCl. Intrinsic viscosity in salt-free solutions was estimated by a method proposed earlier [Pavlov et al. Russ. J. Appl. Chem. 2006, 79, 1407−1412. Molecular characteristics were obtained in 0.2 M NaCl. The polyelectrolytes were studied in more than 10-fold range of molar mass. Qualitatively, the conformational status of the polyelectrolyte chains in different ionic strength was defined with the Kuhn−Mark−Houwink−Sakurada plots normalized by the value of linear chain density. In salt-free solution both polyelectrolytes could be attributed to extra rigid chains with the statistical segment length of 650 nm for sodium polystyrene-4-sulfonate and 100 nm for copolymer chains. Such statistical segment lengths are provided by short-range electrostatic intrachain interactions and are comparable with the Debye screening length. At extremely high NaCl concentration polyelectrolyte chains became discriminated by their degree of hydrophobicity. Chains of hydrophobic nature are compacted up to preglobular state, whereas the chains of the hydrophilic nature stay in the conformation of swelling coils at the highest concentration of NaCl.

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“…In addition, features of the chemical structure of the macromolecule, in par ticular, its hydrophobic or hydrophilic nature, can play a certain role in the formation of one or another con formation of the linear polyelectrolyte chain. To clar ify these issues, the random copolymer of N methyl N vinylacetamide and N methyl N vinylamine hydrochloride (MVAA-MVAH) was synthesized, hydrodynamic studies of its fractions were performed, and the results were compared with earlier data con cerning the hydrodynamic characteristic of sodium polystyrene 4 sulfonate (PSSNa) [7,8]. The non charged analogue of the MVAA-MVAH copolymer is water soluble poly N methyl N vinylacetamide (PMVAA), while hydrophobic polystyrene is the non charged analogue of PSSNa.…”

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Characteristic features of the behavior of charged hydrophilic and hydrophobic macromolecules in solutions of different ionic strength

et al. 2013

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16Polyelectrolytes attract considerable attention of researchers due to their ability to form interpolymer complexes with synthetic polymers and biopolymers. They are used as carriers for biologically active com pounds, as transporting agents in gene therapy for the delivery of genetic material (DNA) to the cells [1-3]. Some of them exhibit various types of biological activ ity: immunostimulating, membrane, antimicrobial, antiviral, and other types of activity [4]. In recent years, studies have concerned issues related to the role of hydrophobic hydrophilic interactions in the poly electrolyte chains under electrostatic interactions caused by the formation of complexes involving poly electrolytes or by the formation of surface films [5]. A large number of works are devoted to computer mod eling of polyelectrolytes and polyelectrolyte systems [6]. This study demonstrates for the fist time the dif ferences in the behaviors of strong polyelectrolytes having hydrophilic or hydrophobic backbones, which are revealed in the studies of polyelectrolyte solutions over a broad range of ionic strength.The conformation and the size of the linear charged macromolecules in aqueous solutions are determined, in addition to the contour length, by the linear electric charge density in the polymer chain and ionic strength of the solution. In addition, features of the chemical structure of the macromolecule, in par ticular, its hydrophobic or hydrophilic nature, can play a certain role in the formation of one or another con formation of the linear polyelectrolyte chain. To clar ify these issues, the random copolymer of N methyl N vinylacetamide and N methyl N vinylamine hydrochloride (MVAA-MVAH) was synthesized, hydrodynamic studies of its fractions were performed, and the results were compared with earlier data con cerning the hydrodynamic characteristic of sodium polystyrene 4 sulfonate (PSSNa) [7,8]. The non charged analogue of the MVAA-MVAH copolymer is water soluble poly N methyl N vinylacetamide (PMVAA), while hydrophobic polystyrene is the non charged analogue of PSSNa.The random copolymer MVAA-MVAH was pre pared by partial acid hydrolysis of the MVAA homopolymer. The details of synthesis and studies of the molecular characteristics of MVAA-MVAH copolymer fractions were reported earlier [9]. The degree of hydrolysis (copolymer composition) was determined by argentometric titration. The copolymer composition differs little for different fractions, the average content of MVAH being (43.6 ± 0.6)%. The molecular masses of the fractions determined from sedimentation diffusion analysis of the MVAA-MVAH copolymers in a 0.2 M solution of NaCl are presented in Table 1. The same table lists the intrinsic viscosities determined in H 2 O and in 0.2 and 5.0 M solutions of NaCl.The intrinsic viscosities in aqueous solutions were calculated as the initial slopes of the lnη r = f(c) depen dences for c → 0: [η]* = dlnη r /dc, where η r is the rela tive viscosity of the solution at concentration с. It was shown that the [η]* value determined in...

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Conformation of sodium poly(4-styrenesulfonate) macromolecules in aqueous solutions

Cited by 10 publications

References 4 publications

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Strong Linear Polyelectrolytes in Solutions of Extreme Concentrations of One–One Valent Salt. Hydrodynamic Study

Characteristic features of the behavior of charged hydrophilic and hydrophobic macromolecules in solutions of different ionic strength

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