Scaling theory of planar brushes formed by branched polymers

摘要: The equilibrium structure of planar brushes formed by flexible, regularly branched (comblike and starlike macromolecules), randomly polymers is considered. diagrams states in τ,σ coordinates (τ = (T - Θ)/T reduced temperature σ grafting area per chain) are constructed, power-law dependencies for the brush thickness H obtained. It shown that due to existence two different length scales characterizing comblike macromolecules, scaling behavior a combed more varied than conventional linear chains. Weakly overlapping combs exhibit similar good solvent (H ∼ -1/3 ) even at Θ-point. Strongly rearrange their local recover exponents Θ-solvent -1/2 ). For marginal solvents, intermediate between Θ-solvents, new exponent -5/13 Brushes demonstrate σ-dependencies However, molecular-weight different.