Langmuir films of polystyrene-b-poly(alkyl acrylate) diblock copolymers

Li, S.; Clarke, C. J. S.; Eisenberg, Adi; Lennox, R. Bruce

doi:10.1016/s0040-6090(99)00570-2

Cited by 26 publications

(27 citation statements)

References 22 publications

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“…From one‐dimensional to planar aggregates, the geometrical curvature increases as the amount of the hydrophobic content is gradually increased. Such a phenomenon is consistently observed and governed especially by the hydrophobic‐hydrophilic balance, but the stability is affected by other external variables, for example, temperature, architecture, and terminal groups 35, 38, 41, 148–152. Except for one compound, all amphiphilic POSS‐M compounds eventually formed a uniform LB monolayer at a high surface pressure.…”

Section: Hyperbranched Polymers and Nano‐microparticles For Compositesmentioning

confidence: 90%

“…Such a phenomenon is consistently observed and governed especially by the hydrophobic-hydrophilic balance, but the stability is affected by other external variables, for example, temperature, architecture, and terminal groups. 35,38,41,[148][149][150][151][152] Except for one compound, all amphiphilic POSS-M compounds eventually formed a uniform LB monolayer at a high surface pressure. At the highest surface pressure, the overall morphology is eventually dominated by the crowding of the POSS-M cores and alkyl branches.…”

Section: Reviewmentioning

confidence: 99%

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Assembling hyperbranched polymerics

Peleshanko¹,

Tsukruk²

2011

J Polym Sci B Polym Phys

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A condensed overview discusses the existing grafting approaches and the surface behavior of various hyperbranched polymers. We focus on the recent strategies and corresponding characterization of the resulting surface morphologies and structures with a number of relevant recent results from the authors' own research and existing literature. Some results discussed here are important for prospective applications of hyperbranched polymers in biomedical fields, for resistive coatings, tough blends, and reinforced nanocomposites are briefly summarized as well. V C 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 50: 83-100, 2012 KEYWORDS: adsorption; hyperbranched; LB films; structural characterization; surfaces INTRODUCTION This publication presents a condensed overview of the existing grafting approaches as applied to hyperbranched polymers and discusses the surface morphologies of these polymers and corresponding composites and coatings. We mostly focus on the recent strategies and corresponding characterization of the resulting surface morphologies and structures developed in the authors' group with some relevant examples from current literature. A number of relevant results are also included here especially in relation to recent developments related to novel synthetic approaches of hyperbranched molecules as well as emerging applications of hyperbranched polymers and coatings for biomedical purposes, as resistive coatings, tough blends, and reinforced nanocomposites. Some comprehensive recent reviews on highly branched polymers, which are focused mainly on synthetic aspects can be found in literature.

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Section: Hyperbranched Polymers and Nano‐microparticles For Compositesmentioning

confidence: 90%

Section: Reviewmentioning

confidence: 99%

Assembling hyperbranched polymerics

Peleshanko¹,

Tsukruk²

2011

J Polym Sci B Polym Phys

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] Amphiphilic block copolymers can self-assemble at the air-water interface into a micro-phase separated structure, which is called surface micelles. The hydrophobic blocks aggregate to form an isolated phase of various shapes and it is stabilized by the corona of hydrophilic blocks spread on the water surface.…”

Section: Introductionmentioning

confidence: 99%

“…They described the transition as a starfish to a jellyfish type transition, 3 but recently reported that the dissolved chain remains adsorbed to the water surface. 15 Also the research group has reported the similar surface micelle behavior for other block copolymers such as PS-b-poly(butyl methacrylate), 16 PS-b-poly(ethylene oxide), 13 and PS-b-poly(alkyl acrylate)s. 12 Another surface active block copolymers, whose surface micelle behavior was extensively studied, are polystyreneb-poly(ethylene oxide) (PS-b-PEO) and polystyrene-b-poly (methyl methacrylate) (PS-b-PMMA). Goncalves da Silva et al investigated the Langmuir monolayer property of PSb-PEO in detail and observed the transition behavior similar to the quaternized PS-b-P4VP.…”

Section: Introductionmentioning

confidence: 99%

Surface micelle formation of polystyrene-b-poly(2-vinyl pyridine) diblock copolymer at air-water interface

et al. 2004

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We have studied the surface micelle formation of polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) at the air-water interface. A series of four PS-b-P2VPs were synthesized by anionic polymerization, keeping the PS block length constant (28 kg/mol) and varying the P2VP block length (1, 11, 28, or 59 kg/mol). The surface pressure-area (π-A) isotherms were measured and the surface morphology was studied by atomic force microscopy (AFM) after Langmuir-Blodgett film deposition onto silicon wafers. At low surface pressure, the hydrophobic PS blocks aggregate to form pancake-like micelle cores and the hydrophilic P2VP block chains spread on the water surface to form a corona-like monolayer. The surface area occupied by a block copolymer is proportional to the molecular weight of the P2VP block and identical to the surface area occupied by a homo-P2VP. It indicates that the entire surface is covered by the P2VP monolayer and the PS micelle cores lie on the P2VP monolayer. As the surface pressure is increased, the π-A isotherm shows a transition region where the surface pressure does not change much with the film compression. In this transition region, which displays high compressibility, the P2VP blocks restructure from the monolayer and spread at the air-water interface. After the transition, the Langmuir film becomes much less compressible. In this high-surface-pressure regime, the PS cores cover practically the entire surface area, as observed by AFM and the limiting area of the film. All the diblock copolymers formed circular micelles, except for the block copolymer having a very short P2VP block (1 kg/mol), which formed large, non-uniform PS aggregates. By mixing with the block copolymer having a longer P2VP block (11 kg/mol), we observed rod-shaped micelles, which indicates that the morphology of the surfaces micelles can be controlled by adjusting the average composition of block copolymers.

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“…Amphiphilic diblock copolymers were used for formation and investigation of polymeric Langmuir monolayers and fabrication of organized polymeric films via LB technique [289][290][291][292][293][294][295][296][297][298][299][300][301][302][303]. Surface micelles were observed in a number of diblock copolymer LB films in dependence on polymer composition and monolayer parameters [304][305][306][307][308][309][310][311][312]. Phase separation effects in amphiphilic block copolymer monolayer at the air-water interface was observed [313].…”

Section: Organized Planar Polymeric Nanostructuresmentioning

confidence: 99%

Interfacially formed organized planar inorganic, polymeric and composite nanostructures

Хомутов

2004

Advances in Colloid and Interface Science

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Langmuir films of polystyrene-b-poly(alkyl acrylate) diblock copolymers

Cited by 26 publications

References 22 publications

Assembling hyperbranched polymerics

Assembling hyperbranched polymerics

Surface micelle formation of polystyrene-b-poly(2-vinyl pyridine) diblock copolymer at air-water interface

Interfacially formed organized planar inorganic, polymeric and composite nanostructures

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