Composites copolymères-nanoparticules : I. Période lamellaire dans le régime des “petites nanoparticules"

Incorporation of PPE in Lamellar Self-Assembled PS-b-P4VP(PDP) Supramolecules and PS-b-P4VP Diblock Copolymers

“…48 The assumption of a uniform distribution of homopolymer is in line with the Alexander-De Gennes approximation. A more accurate self-consistent-field approach will obviously show a slightly nonuniform homopolymer distribution with somewhat more homopolymer near the midplane where the copolymer blocks are least stretched.…”

“…A simple theoretical model to describe the change in domain dimensions of a lamellar self-assembled block copolymer system on incorporation of nanoparticles inside one of the layers of a lamellar diblock copolymer was put forward by Hamdoun et al 48 This description is not specific to nanoparticles but applies equally well to homopolymer/block copolymer blends, and recently it was used to discuss the distribution of low molar mass PS in the lamellae of thin films of nearly symmetric PSb-PMMA diblock copolymers 49 and of PVDF in the lamellae of thin films of similar PS-b-PMMA diblock copolymers. 50 If the homopolymers segregate in the midplane, the chain conformations of the copolymer blocks and the distance between the copolymer junction points are not affected.…”

Cooperative Self‐Assembly of Nanoparticle Mixtures in Lamellar Diblock Copolymers: A Dissipative Particle Dynamics Study

“…The self‐assembly of a single kind of nanoparticles in block copolymers has been extensively studied both experimentally4,6–9 and theoretically;10–12 however, investigations on the self‐assembly of two kinds of nanoparticles in block copolymers are very scarce. Bockstaller et al8 investigated the self‐assembly of binary nanoparticle mixtures in symmetric lamellar diblock copolymers experimentally and found that the nanoparticles of larger size localized in the center of the preferred domain and those of smaller size concentrated at the block interface in the same domain.…”

Morphology Selection of Nanoparticle Dispersions by Polymer Media

“…The interparticle medium plays a crucial role in this regard, and one would like to "design" media to achieve different spatial arrangements leading to different interparticle couplings and entirely different macroscopic properties. Much recent research has examined polymeric media spontaneously forming nanostructured phases as templates for particle organization [1,2,3,4]. Moreover, polymer-particle composites are often conveniently processable with important implications for thin film and other technologies [2,5,6].…”

“…where the pressure field remains quadratic but the substrate pressure and brush height are increased. Noting the pressure vanishes at the brush surface z = h, and is approximately linear for small depths, we write φ nano (z) ∼ e −(h−z)/δ where δ ≡ h(b * /b) 3 and b * ≈ (N/h) 2/3 = 1/σ 2/3 . Thus for b ≫ b * the penetration depth δ ∼ 1/b 3 is much less than the full brush height.…”