Theory of Polymer Brushes of Liquid-Crystalline Polymers

Amoskov, Victor M.; Birshtein, T.M.; Pryamitsyn, Victor

doi:10.1021/ma9603140

Cited by 43 publications

(97 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16,17) , the first order phase transition in a point U B = U B tr remains so. However, the jumb of density for a brush as a whole is substituted by a jump in a thin sublayer with higher u p value.…”

Section: Note Added In Proofmentioning

confidence: 90%

Amphiphilic polymer brush in a mixture of incompatible liquids

Birshtein¹,

Zhulina

Mercurieva

2000

Macromol. Theory Simul.

Self Cite

View full text Add to dashboard Cite

An analogue of the Alexander‐DeGennes box model is used for theoretical investigation of polymer brushes in a mixture of two solvents. The basic solvent A and the admixture B are assumed to be highly incompatible (Flory‐Huggins parameter χAB = 3.5). Thermodynamics of a polymer in the solvents A and B are described by parameters χB < χA ≤ 1/2. The equilibrium behavior of a brush is investigated in dependence on solvent composition, grafting density, polymer‐solvents and solvent‐solvent interactions. The possibility of a phase transition related with a strong preferential solvation of a brush by a minor solvent component with higher affinity to polymer is shown and examined. Microphase segregation inside a brush is also demonstrated despite overestimating of the brush homogeneity given by the box model. A further simplification of the model permits to obtain scaling formulas and to investigate main regularities in the brush behavior. This offers a clear physical picture of the phase segregation inside a brush in correlation with the phase state of a bulk solvent.

show abstract

Section: Note Added In Proofmentioning

confidence: 90%

Amphiphilic polymer brush in a mixture of incompatible liquids

Birshtein¹,

Zhulina

Mercurieva

2000

Macromol. Theory Simul.

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to theoretical simulations, the main factors determining the orientational and conformational properties of macromolecules in brushes are density of their grafting, molecular weight of polymer used and outer conditions. [2][3][4] Among the approaches allowing to optimize these parameters there is a change of chemical structure of spacer used for grafting polymer moieties to the surface.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic Investigation of Polypeptide Plane Brushes

Vlasova

Волчек

Tarasenko

et al. 2011

Macromolecular Symposia

View full text Add to dashboard Cite

Summary: Fourier transform infrared spectroscopy (FTIR) was used for determination of orientational and conformational characteristics of plane polypeptide brushes with different density of polypeptide chains grafted to modified silicon surface. The determination of grafting density of polypeptide chains in brushes, which depends on chemical structure of spacer groups, was carried out using ultraviolet (UV) spectroscopy. The influence of chemical structure of modifying spacer groups and outer conditions on the characteristics of plane polypeptide brushes was established. The peculiarities of a-helical structure (random coil transfer of polymer chains in brushes under the action of denaturants) were investigated.

show abstract

“…[11] In another study simple analytical solutions for the SCF potential were found assuming a brush consisting of chains of finite extensibility, which are free walks on simple cubic, diamond and body-centered cubic (BCC) lattices. [12] The solution for a brush on the BCC lattice is more convenient for investigations. For brevity we call the model of a brush on the BCC lattice BCC model.…”

Section: Introductionmentioning

confidence: 99%

“…An analytical solution was found for density profiles r(x) and free-ends distributions g(y) for the BCC model in a good solvent. [12] The analytical solution of a salt-free polyelectrolyte BCC model in a good solvent is also described. Investigations into polyelectrolyte brushes with finite extensibility was also described.…”

Section: Introductionmentioning

confidence: 99%

“…We will analyze the dependence of chain extensibility, which was not adequately discussed in the literature. [2,12] An analytical solution for a melt of nonGaussian brushes will be presented. All results are compared with previous ones for Gaussian brushes and with numerical results for a brush of finite chain length obtained utilizing the Scheutjens-Fleer algorithm.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Free Energy of a Non‐Gaussian Polymer Brush

Amoskov¹,

Pryamitsyn²

2003

Macro Theory & Simulations

Self Cite

View full text Add to dashboard Cite

An analytical theory describing layers of polymer chains grafted to a planar surface (i.e. polymer brush) is developed. We consider a brush of chains with finite extensibility (or non‐Gaussian brush) within the framework of molecular field theory. An analytical solution for free energy of the brush and a few other brush characteristics are obtained and studied. Comparison with other known models of a brush is also made.Chain extensibility E(x, y) for Gaussian model (dashed lines) and BCC model (solid lines) for a few chain end positions y (numbers near curves).imageChain extensibility E(x, y) for Gaussian model (dashed lines) and BCC model (solid lines) for a few chain end positions y (numbers near curves).

show abstract

Theory of Polymer Brushes of Liquid-Crystalline Polymers

Cited by 43 publications

References 13 publications

Amphiphilic polymer brush in a mixture of incompatible liquids

Amphiphilic polymer brush in a mixture of incompatible liquids

Spectroscopic Investigation of Polypeptide Plane Brushes

Free Energy of a Non‐Gaussian Polymer Brush

Contact Info

Product

Resources

About