Rheology of a miscible polymer blend at the air-water interface. Quasielastic surface light scattering study and analysis in terms of static and dynamic scaling laws

Article Abstract:

The rheology of a miscible polymer mixture at the air-aqueous interface has been characterized using surface light scattering by thermally excited capillary waves spectrometer as well as a classical surface tension technique. For this purpose, monolayers of poly(vinyl acetate) (PVAc) + poly(4-hydroxystyrene) (P4HS) blends on an aqueous subphase were examined over the whole surface concentration and blend composition ranges. Results show that the air-water interface acts as a good solvent for the monolayers of PVAc-rich blends.

Polymers, Monomolecular films, Surface chemistry, Solvents, Light scattering, Rheology

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Surface light-scattering at the air-liquid interface: From Newtonian to viscoelastic polymer solutions

Article Abstract:

The dynamics of the liquid-air interface of aqueous solutions of a tensioactive triblock copolymer is studied using surface quasielastic light scattering over a broad range of concentrations and temperatures. The results show that the classical theoretical spectrum for monolayers on a Newtonian fluid can be applied only for concentrations below 4.10(super -2).

Science & research, Viscoelasticity, Aqueous solution reactions, Copolymers

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Concentration fluctuations and surface adsorption in hydrogen-bonded mixtures

Article Abstract:

The surface adsorption data and the characterization of the concentrated fluctuations of 1,4-butanediol + 1-dodecanol mixture are presented. The laser light-scattering experiments conducted on these components at two temperatures reveals that both mixtures have a clear tendency toward heterocoordination that increases with temperature.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Butanediol, Crystals, Crystal structure, Laser spectroscopy

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