Hydrodynamic characteristics and equilibrium rigidity of pullulan molecules

Pavlov, G. G.; Корнеева, Е. В.; Yevlampieva, N. P.

doi:10.1016/0141-8130(94)90063-9

Cited by 40 publications

(18 citation statements)

References 21 publications

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“…It should be noted that regular studies of narrow polymeric standards in a wide interval of molar masses by different methods including the methods of molecular hydrodynamics are rather rare. [21][22][23] An appendix to this article contains both the primary sedimentation data collected and some discussion of the characteristics of the polymers studied such as the refractive index increment, partial specific volume, Huggins and Kramer parameters, values of hydrodynamic invariant and sedimentation parameter, and BurchardStockmayer-Fixman and Cowie-Bywater approximations for evaluation of the statistical segment length. The latter, as a rule, turned out not to depend on the molar mass.…”

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confidence: 99%

Velocity Sedimentation and Intrinsic Viscosity Analysis of Polystyrene Standards with a Wide Range of Molar Masses

Perevyazko

Schubert

2010

Macro Chemistry & Physics

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Analytical ultracentrifugation is one of the key methods among the molecular hydrodynamic methods of polymer science, biophysics, and colloid science. The aim of this work is to demonstrate the possibilities of a modern instrument, the Beckman XLI Analytical Ultracentrifuge, coupled with the now available software for the molecular characterization of synthetic polymers. For this purpose the classical system polystyrene in methyl ethylketone was investigated. The samples of low polydispersity index were studied in a 1 000‐fold interval of molar mass values. The exhaustive analysis of such hydrodynamic values as velocity sedimentation coefficient, frictional ratio, concentration Gralen coefficient, and intrinsic viscosity, was done. The values of partial specific volume, refractive index increment, and hydrodynamic invariants were also determined and discussed. The estimation of the statistical segment length (or persistent length) of polystyrene chains was made taking into account the intrachain excluded volume and draining effects (Gray–Bloomfield–Hearst theory). The obtained experimental data and results of its analysis allow the conclusion that the method of velocity sedimentation, coupled with the numerical solution of the Lamm equation, represents a powerful absolute characterization method for molar mass determination of flexible polymers of low polydispersity in relatively poor solvent.magnified image

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confidence: 99%

Velocity Sedimentation and Intrinsic Viscosity Analysis of Polystyrene Standards with a Wide Range of Molar Masses

Perevyazko

Schubert

2010

Macro Chemistry & Physics

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“…Let's compare macromolecular size of different water‐soluble polymers studied earlier: poly( N ‐vinylpyrrolidone),13 poly(vinylformamide),36 pullulan 37. For that purpose the approach proposed in ref 38.…”

Section: Resultsmentioning

confidence: 99%

Conformational Parameters of Poly(N‐methyl‐N‐vinylacetamide) Molecules Through the Hydrodynamic Characteristics Studies

Pavlov

Okatova

Mikhailova

et al. 2010

Macromolecular Bioscience

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Water-soluble PMVA was synthesized by radical polymerization methods. A number of polymer samples were fractionated in the chloroform-diethyl ether system. Fractions were studied by molecular hydrodynamics methods (sedimentation velocity, translational isothermal diffusion and viscosity) in H(2)O and DMF. The molecular masses of fractions were determined and the Kuhn-Mark-Houwink-Sakurada relationships were obtained in the molecular mass range of 3.5 < M x 10(-3) g x mol(-1) <540. A negative temperature coefficient of the characteristic viscosity was obtained in both solvents. The Kuhn statistic segment length and the hydrodynamic diameter of the molecule were estimated for PMVA. The hydrodynamic volumes, occupied by the molecules of PMVA, poly(1-vinyl-2-pyrrolidone), poly(vinylformamide), and pullulan were compared.

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“…Dashed lines represent average values for the hydrodynamic invariants, A 0 (Equation (12)), calculated from the respective data of a particular conformational type of macromolecules. Color and symbol assignments for naturally-based macromolecules: Black-Rigid, Xanthan (squares) [25], Chitosan (circles) [26,27], Schizophyllan (triangles up) [28]; Blue-Semi-Flexible, Pectin (squares) [29,30], Chitosan (circles) [31][32][33][34], Chitin (triangles up) [35], Cellulose (triangles down) [12,[36][37][38][39][40][41], Heparin (diamonds) [42], Ficoll400 (triangles left) [43]; Green-Flexible, Glucan (squares) [44], Mannan (circles) [45], Pullulan (triangles up) [46], Carrageenan (triangles down) [47], Polyvinylsaccharide (diamonds) [48,49]; Red-Branched, Glucan (squares) [50], Lysin (circles) [51]. Color and symbol assignments for synthetically-based macromolecules: Blue-Semi-Flexible, Polyelectrolyte (squares), cationic [52]; Green-Flexible, Polyelectrolyte (squares), cationic [53][54][55][56][57][58][59][60][61][62], anionic [63], Poly(ethylene) glycol (PEG) (circles) [14], Poly(2-alkyl-2-oxazoline) (POx)...…”

Section: The Hydrodynamic Invariant and Sedimentation Parametermentioning

confidence: 99%

“…Dashed lines represent different averages for the sedimentation parameter, β s (Equation 14), characteristic for different conformation types. Color and symbol assignments of naturally-based macromolecules: Black-Rigid, Xanthan (squares) [25], Schizophyllan (triangles up) [28]; Blue-Semi-Flexible, Pectin (squares) [29,30], Chitosan (circles) [31,33,34], Chitin (triangles up) [35], Cellulose (triangles down) [12,[38][39][40][41]77], Heparin (diamonds) [42]; Green-Flexible, Mannan (circles) [45,78], Pullulan (triangles up) [46], Carrageenan (triangles down) [47]. Color and symbol assignments of synthetically-based macromolecules: Green-Flexible, Polyelectrolyte (squares), cationic [55,59,60], POx (triangles up) [13,65], amide containing vinyl copolymers (triangles down) [66,67], PEI (diamonds) [68], Polyvinylpyrrolidone (triangles left) [69]; Red-Branched, PEG copolymers (squares) [24].…”

Section: Recent Values For the Sedimentation Parameter β Smentioning

confidence: 99%

Incentives of Using the Hydrodynamic Invariant and Sedimentation Parameter for the Study of Naturally- and Synthetically-Based Macromolecules in Solution

et al. 2020

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The interrelation of experimental rotational and translational hydrodynamic friction data as a basis for the study of macromolecules in solution represents a useful attempt for the verification of hydrodynamic information. Such interrelation originates from the basic development of colloid and macromolecular science and has proven to be a powerful tool for the study of naturally- and synthetically-based, i.e., artificial, macromolecules. In this tutorial review, we introduce this very basic concept with a brief historical background, the governing physical principles, and guidelines for anyone making use of it. This is because very often data to determine such an interrelation are available and it only takes a set of simple equations for it to be established. We exemplify this with data collected over recent years, focused primarily on water-based macromolecular systems and with relevance for pharmaceutical applications. We conclude with future incentives and opportunities for verifying an advanced design and tailored properties of natural/synthetic macromolecular materials in a dispersed or dissolved manner, i.e., in solution. Particular importance for the here outlined concept emanates from the situation that the classical scaling relationships of Kuhn–Mark–Houwink–Sakurada, most frequently applied in macromolecular science, are fulfilled, once the hydrodynamic invariant and/or sedimentation parameter are established. However, the hydrodynamic invariant and sedimentation parameter concept do not require a series of molar masses for their establishment and can help in the verification of a sound estimation of molar mass values of macromolecules.

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Hydrodynamic characteristics and equilibrium rigidity of pullulan molecules

Cited by 40 publications

References 21 publications

Velocity Sedimentation and Intrinsic Viscosity Analysis of Polystyrene Standards with a Wide Range of Molar Masses

Velocity Sedimentation and Intrinsic Viscosity Analysis of Polystyrene Standards with a Wide Range of Molar Masses

Conformational Parameters of Poly(N‐methyl‐N‐vinylacetamide) Molecules Through the Hydrodynamic Characteristics Studies

Incentives of Using the Hydrodynamic Invariant and Sedimentation Parameter for the Study of Naturally- and Synthetically-Based Macromolecules in Solution

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