Dynamic Properties of Poly(styrene)–Poly(ethylene oxide) Diblock Copolymer Films at the Air–Water Interface

Noskov, Boris A.; Akentiev, Alexander V.; Miller, R.

doi:10.1006/jcis.2001.8121

Cited by 25 publications

(40 citation statements)

References 44 publications

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“…A transition from a two dimensional "pancake" or SSAL to a "mushroom" regime, in which polymer chains form loops and tails in the subphase, is observed with increasing surface concentration. From ellipsometric and surface pressure results this transition seems rather smooth but it can be clearly detected by the scattered intensity under evanescent illumination [14,15]. Moreover, the apparent interfacial diffusion coefficient measured by evanescent wave dynamic light scattering shows the following scaling: D ∼ Γ 0.77 in analogy with the scaling observed for polymer molecules in the semidilute regime [2,47].…”

Section: Discussionmentioning

confidence: 68%

“…Differently form a "pancakes"-regime, one can imagine a scenario in which the polymer adopt a loose network structure as for self-similar adsorbed layer (SSAL) [46]. Hence, the transition observed at Γ= ca 0.7 mg m −2 could be interpreted as the transition to a more extended 3D structure occurring when the chains are already overlapped [46,14]. Aguie-Beghin et al assumed that 2D conformations can be estimated by the two-dimensional Flory's radius R F 2 for multiblock polymers at the gas-liquid interface [42].…”

Section: Interfacial Regimesmentioning

confidence: 99%

“…This concentration is usually controlled by varying the interfacial area in a Langmuir trough, in which a non-aqueous polymer solution is spread on the top of the water surface. These layers are known as "Langmuir layers"and their structural conformations have been studied by tensiometry, rheology, neutron/x-ray reflectivity, capillary wave scattering, electrocapillary waves and oscillating barrier experiments [8,9,10,11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of amphiphilic diblock copolymers at the air–water interface

Stocco

Tauer

Pispas

et al. 2011

Journal of Colloid and Interface Science

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Two polyisoprene-polyethyleneoxide diblock copolymers with different block length ratios adsorbed to the water surface were investigated by multiple angle of incidence ellipsometry, evanescent wave light scattering, and surface tension experiments. In a semidilute interfacial regime, the transition from a two dimensional to a "mushroom" regime, in which polymer chains form loops and tails in the subphase, was discussed. A diffusion mechanism parallel to the interface was probed by evanescent wave dynamic light scattering. At intermediate concentrations, the interfacial diffusion coefficient D scales with the surface concentration Γ, as D ∼ Γ 0.77 in agreement with the scaling observed for polymer solutions in a semidilute regime. At relatively high concentrations a decreasing of D is discussed in terms of increasing friction due to interactions between polyisoprene chains.

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Section: Discussionmentioning

confidence: 68%

Section: Interfacial Regimesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dynamics of amphiphilic diblock copolymers at the air–water interface

Stocco

Tauer

Pispas

et al. 2011

Journal of Colloid and Interface Science

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“…Poly(styrene)‐ block ‐poly(ethylene oxide) (PS‐ b ‐PEO) is a well‐studied copolymer12–15 forming different patterns of nanostructures (dots, spaghetti, rings, chainlike aggregates, etc.) at the air/water interface resulting from the spontaneous copolymer aggregation.…”

Section: Introductionmentioning

confidence: 99%

Isobaric relaxation phenomenon of mixed PMMA/PS‐b‐PEO monolayers at different temperatures

Jheng

Hsu

2012

J of Applied Polymer Sci

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The objective of this research was to find out the effect of molecular weight of poly(methyl methacrylate) (PMMA) and temperature on the isobaric relaxation behaviors of mixed PMMA/poly(styrene)-block-poly(ethylene oxide) (PS-b-PEO) monolayers. Isobaric relaxation experiments of mixed monolayers of PMMA with different molecular weights and PS-b-PEO at the air/water interface were investigated at three different temperatures (10, 25, and 40 C). The PS-b-PEO monolayer was found to exhibit a fast relaxation curve (i.e., the surface area decreased significantly with increasing time). Addition of PMMA into PS-b-PEO slowed the relaxation behavior especially at the lowest experimental temperature (10 C). It was shown that the area relaxation process of mixed PMMA/PS-b-PEO monolayers could be well represented by a model considering the nucleation and growth mechanisms. The characteristic exponent x values were found to be almost temperature independent. The k x values were detected to decrease mostly as a result of temperature elevation regardless of pure or mixed monolayers. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: E267-E274, 2012

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“…They are likely to be immmiscible in the monolayer state. Poly(styrene)-block-poly(ethylene oxide)(PS-b-PEO) is a wellstudied copolymer [16][17][18][19] forming different patterns of nanostructures (dots, spaghetti, rings, chainlike aggregates etc.) at the air/water interface resulting from the spontaneous copolymer aggregation.…”

Section: Introductionmentioning

confidence: 99%

Molecular weight effect of PMMA on its miscibility with PS‐b‐PEO at the air/water interface

Jheng

Hsu

2012

J of Applied Polymer Sci

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The mixed monolayer behavior of poly(methyl methacrylate) (PMMA) with different molecular weights and polystyrene‐block‐polyethylene oxide (PS‐b‐PEO) was investigated from the measurements of surface pressure–area per molecule (π‐A) isotherms at three different temperatures (10°C, 25°C, and 40°C). The miscibility and nonideality of the mixed monolayers were examined by calculating the excess surface area as a function of composition. The molecular weight of PMMA was demonstrated to have a major effect on its miscibility with PS‐b‐PEO. Negative or close to zero deviations from ideality of surface areas were observed for PMMA with the lowest molecular weight (12,000 g/mole). Mostly positive deviations were detected in mixed PMMA/PS‐b‐PEO monolayers with higher molecular weights of PMMA. Because of probable mushroom‐to‐brush transition effect, the miscibility between PMMA and PS‐b‐PEO was found to be the best at 25°C among the experimental temperatures. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Dynamic Properties of Poly(styrene)–Poly(ethylene oxide) Diblock Copolymer Films at the Air–Water Interface

Cited by 25 publications

References 44 publications

Dynamics of amphiphilic diblock copolymers at the air–water interface

Dynamics of amphiphilic diblock copolymers at the air–water interface

Isobaric relaxation phenomenon of mixed PMMA/PS‐b‐PEO monolayers at different temperatures

Molecular weight effect of PMMA on its miscibility with PS‐b‐PEO at the air/water interface

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