Surface activity and association of ABA polyoxyethylene—polyoxypropylene block copolymers in aqueous solution

Prasad, K. Nagendra; Luong, Tran Thuy; Paris, Alexander T FlorenceJoelle; Vaution, C.; Seiller, M.; Puisieux, F.

doi:10.1016/0021-9797(79)90151-6

Cited by 156 publications

(71 citation statements)

References 15 publications

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“…Similar unusual features, even more pronounced than those of tyloxapol, were reported for the surface properties of polyoxyethylene-polyoxypropylene-polyoxyethylene copolymers of low molecular weight (poloxamers or Pluronics) (19). With molecular weights ranging from 1600 to 8000, their areas per molecule at saturation adsorption range from 64 to 146 Å 2 .…”

Section: Surface Tension and Critical Micelle Concentrationmentioning

confidence: 66%

See 1 more Smart Citation

Comparing the Surface Chemical Properties and the Effect of Salts on the Cloud Point of a Conventional Nonionic Surfactant, Octoxynol 9 (Triton X-100), and of Its Oligomer, Tyloxapol (Triton WR-1339)

Schott

1998

Journal of Colloid and Interface Science

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Section: Surface Tension and Critical Micelle Concentrationmentioning

confidence: 66%

“…This suggests that the molecules are oriented in the surface in a coiled manner, with the polyoxypropylene segment out of the aqueous phase and the hydrophilic polyoxyethylene groups at both extremities of the molecules anchoring the polymer in the aqueous phase" (19).…”

Section: Surface Tension and Critical Micelle Concentrationmentioning

confidence: 99%

Comparing the Surface Chemical Properties and the Effect of Salts on the Cloud Point of a Conventional Nonionic Surfactant, Octoxynol 9 (Triton X-100), and of Its Oligomer, Tyloxapol (Triton WR-1339)

Schott

1998

Journal of Colloid and Interface Science

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“…The thickness of the layer was also found to increase with particle size [19]. The area occupied by a block co-polymer molecule at a hydrophobic surface was found to be greater than those observed at the air-water interface [20,21] and considerably less than those at a hydrophilic surface, e.g. silica-water interface [22].…”

Section: Introductionmentioning

confidence: 89%

Adsorption of PEO/PPO triblock co-polymers and wetting of coal

Polat¹,

Chander²

1999

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The adsorption characteristics of PEO/PPO/PEO triblock co-polymers on coal were investigated using surface tension and contact angle measurements. Although these surfactants have been widely used as wetting agents, it was observed that they increased the hydrophobicity of coal at concentrations below about 10 − 6 M. Surface tension studies were carried out to explain the reasons for this behavior. The surface tension versus concentration profiles displayed three distinct regions. In region I, surface tension decreased linearly and monomers were proposed to be the dominant species. This region extended to a surfactant concentration of about 10 − 6 M. In region II, a transition region between regions I and III, dimers, trimers, etc., were considered to form. In region III, micelles formed and surface tension was independent of concentration. The concentration at which monomers associate to form dimers, etc., is referred to as the critical association concentration (cac). The contact angle of coal increased when concentration was raised from low values to the cac. It decreased when the reagent concentration was above the cac. Finally, at concentrations above the cmc, the wetting of coal was complete and contact angle was zero.

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“…The area occupied by a block co-polymer molecule at a hydrophobic surface was found to be greater than those observed at the &/water interface (Alexandridis et d., Prasad et al, 1979) and considerably less than those at a hydrophilic surfice e.g.…”

Section: Al 1989)mentioning

confidence: 94%

Micro-agglomerate flotation for deep cleaning of coal. Final report

Chander¹,

Hogg²

1997

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Surface activity and association of ABA polyoxyethylene—polyoxypropylene block copolymers in aqueous solution

Cited by 156 publications

References 15 publications

Comparing the Surface Chemical Properties and the Effect of Salts on the Cloud Point of a Conventional Nonionic Surfactant, Octoxynol 9 (Triton X-100), and of Its Oligomer, Tyloxapol (Triton WR-1339)

Comparing the Surface Chemical Properties and the Effect of Salts on the Cloud Point of a Conventional Nonionic Surfactant, Octoxynol 9 (Triton X-100), and of Its Oligomer, Tyloxapol (Triton WR-1339)

Adsorption of PEO/PPO triblock co-polymers and wetting of coal

Micro-agglomerate flotation for deep cleaning of coal. Final report

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