Forces between surfaces bearing terminally-anchored polymer chains

Taunton, Hillary J.; Toprakcioglu, Chris; Fetters, Lewis J.; Klein, Jacob

doi:10.1016/0166-6622(88)80190-2

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…Once the eigenvalue problem is solved, we construct the 0A(y) via eq A. 6, which becomes The convergence of this double sum is controlled by both the exponential terms and the factor 1/[T(A* -Ay)]. The summation is reduced greatly by omitting terms where both e~xiT and e'x*T are small.…”

Section: Discussionmentioning

confidence: 99%

“…These systems have been studied experimentally by small-angle neutron scattering,1'2 hydrodynamic thickness measurements,3 and Israelachvili surface forces techniques. [4][5][6][7][8][9] The experiments provide information on the shapes and sizes of the density profiles and how they vary with, for example, molecular weight and solvent quality. Here we summarize very briefly some of the scaling results that were extracted, with a view to illustrating the range of results which we attempt to explain in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Theory of adsorbed block copolymers

Whitmore¹,

Noolandi²

1990

Macromolecules

109

125

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We present a study of adsorbed diblock copolymers, which is based on the mean-field selfconsistent theory of incompressible polymer/solvent blends. We assume that one of the blocks is tightly adsorbed and model the remaining block using the formalism recently developed for crystallizable/ amorphous block copolymer blends. Restricting attention primarily to near-9 conditions, we present series of calculations describing adsorption at a single surface and adsorption on two parallel surfaces a finite distance apart. For the second case, we calculate the long-range forces acting on the two surfaces. We make quantitative comparisons with experiment for conditions corresponding to slightly good, 0, and slightly poor solvents. We determine the thickness and shape of the polymer density profiles, obtain approximate scaling relations and the ranges of their applicability, study finite molecular weight effects, as well as the extent of the interdigitation of layers adsorbed on opposite surfaces, and show how these quantities vary as the surface separation changes. In addition, we show how the scaling of the apparent range of the measured long-range force can differ from the scaling of the thickness of a single adsorbed layer.

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Section: Discussionmentioning

confidence: 99%